feat: cite option lists as choices_from

RetroBat's es_features.cfg and KNULLI's es_features.yml list the values
a menu offers. They move out of source_ref into choices_from, beside the
generator that writes the choice. RetroBat's xemu flashrom record holds
outside a Chihiro launch (Xemu.Generator.cs:48, 284), and KNULLI's
libretro boot disk records name the one core es_features offers them
for. Rescraped at the pinned revisions.

platforms/knulli.yml

@@ -5662,9 +5662,10 @@ launchers:
   depends_on_option: "bootdisk (not (messSysName[messMode] == '' or messMode == -1)\
     \ and softList == '' and system.name == 'macintosh' and system.isOptSet('bootdisk')\
     \ and not (system.config['bootdisk'] in ['macos30', 'macos608', 'macos701', 'macos75']))"
+  choices_from: "package/emulationstation/knulli-es-system/es_features.yml:11037-11043"
   source_ref: "package/system/knulli-configgen/configgen/configgen/generators/mame/mameGenerator.py:303-305,\
-    \ 375-379, 384-385, package/emulationstation/knulli-es-system/es_features.yml:11037-11043"
-- emulator: mame, mess, mamevirtual, same_cdi
+    \ 375-379, 384-385"
+- emulator: mame
   build: libretro
   kind: fixed_name
   names:
@@ -5685,7 +5686,7 @@ launchers:
     \ in ['macos30', 'macos608', 'macos701', 'macos75'])"
   source_ref: "package/system/knulli-configgen/configgen/configgen/generators/libretro/libretroMAMEConfig.py:64,\
     \ 123, 197, 265-268, 270, 274"
-- emulator: mame, mess, mamevirtual, same_cdi
+- emulator: mame
   build: libretro
   kind: fixed_name
   names:
@@ -5704,8 +5705,9 @@ launchers:
     \ 'plugnplay', 'vis']) and not (messSysName[messMode] == '') and not (softList\
     \ != '') and system.name == 'macintosh' and system.isOptSet('bootdisk') and not\
     \ (system.config['bootdisk'] in ['macos30', 'macos608', 'macos701', 'macos75']))"
+  choices_from: "package/emulationstation/knulli-es-system/es_features.yml:3727-3733"
   source_ref: "package/system/knulli-configgen/configgen/configgen/generators/libretro/libretroMAMEConfig.py:64,\
-    \ 123, 197, 265-268, 273-274, package/emulationstation/knulli-es-system/es_features.yml:3727-3733"
+    \ 123, 197, 265-268, 273-274"
 - emulator: dolphin
   build: standalone
   kind: fixed_name

platforms/retrobat.yml

@@ -4259,7 +4259,8 @@ launchers:
   passes_to: "settings.ini [BIOS] PathNTSCJ = PathNTSCU = PathPAL = <value>"
   fails_when_missing: not checked by the launcher
   depends_on_option: duck_bios
-  source_ref: "emulatorLauncher/Generators/Duckstation.Generator.cs:197-202, .emulationstation/es_features.cfg:12489-12497"
+  choices_from: ".emulationstation/es_features.cfg:12489-12497"
+  source_ref: "emulatorLauncher/Generators/Duckstation.Generator.cs:197-202"
 - emulator: eka2l1
   build: standalone
   kind: passes_path
@@ -4599,7 +4600,8 @@ launchers:
   passes_to: "hatari.cfg [ROM] szTosImageFileName=<bios>/hatari/tos/<value>"
   fails_when_missing: ApplicationException 'Missing TOS file <tosName> in 'bios' folder.'
   depends_on_option: hatari_tos
-  source_ref: "emulatorLauncher/Generators/Hatari.Generator.cs:410-415, 454, .emulationstation/es_features.cfg:13768-13774"
+  choices_from: ".emulationstation/es_features.cfg:13768-13774"
+  source_ref: "emulatorLauncher/Generators/Hatari.Generator.cs:410-415, 454"
 - emulator: hatari
   build: standalone
   kind: fixed_name
@@ -4639,7 +4641,8 @@ launchers:
   passes_to: hatari_tosimage = <value>, if the file is there | default
   fails_when_missing: hatari_tosimage = default
   depends_on_option: hatari2014_tos
-  source_ref: "emulatorLauncher/Generators/LibRetro.CoreOptions.cs:3409-3417, .emulationstation/es_features.cfg:7095-7102"
+  choices_from: ".emulationstation/es_features.cfg:7095-7102"
+  source_ref: "emulatorLauncher/Generators/LibRetro.CoreOptions.cs:3409-3417"
 - emulator: hatarib
   build: libretro
   kind: fixed_name
@@ -4667,8 +4670,8 @@ launchers:
   passes_to: hatarib_tos = hatarib/<value>
   fails_when_missing: hatarib_tos = <etos1024k>, or <tos.img> when bios holds it
   depends_on_option: hatarib_tos
-  source_ref: "emulatorLauncher/Generators/LibRetro.CoreOptions.cs:3434-3435, 3457-3474,\
-    \ .emulationstation/es_features.cfg:7125-7134"
+  choices_from: ".emulationstation/es_features.cfg:7125-7134"
+  source_ref: "emulatorLauncher/Generators/LibRetro.CoreOptions.cs:3434-3435, 3457-3474"
 - emulator: hatarib
   build: libretro
   kind: copies
@@ -4885,7 +4888,8 @@ launchers:
   fails_when_missing: falls back to dsi_nand.bin
   depends_on_option: melonds_console == "dsi", melonds_nandregion set, rom extension
     not ".bin"
-  source_ref: "emulatorLauncher/Generators/MelonDS.Generator.cs:193-202, .emulationstation/es_features.cfg:16816-16823"
+  choices_from: ".emulationstation/es_features.cfg:16816-16823"
+  source_ref: "emulatorLauncher/Generators/MelonDS.Generator.cs:193-202"
 - emulator: mesen
   build: standalone
   kind: copies
@@ -5081,7 +5085,8 @@ launchers:
   passes_to: "kronos.ini [1.0] General\\Bios = <bios>/<value>, only if the file exists"
   fails_when_missing: General\Bios not written
   depends_on_option: kronos_force_bios
-  source_ref: "emulatorLauncher/Generators/Kronos.Generator.cs:162-170, .emulationstation/es_features.cfg:14519-14524"
+  choices_from: ".emulationstation/es_features.cfg:14519-14524"
+  source_ref: "emulatorLauncher/Generators/Kronos.Generator.cs:162-170"
 - emulator: ssf
   build: standalone
   kind: core_option
@@ -5094,7 +5099,8 @@ launchers:
   passes_to: "SSF.ini [Peripheral] SaturnBIOS = <bios>/<value>, only if the file exists"
   fails_when_missing: SaturnBIOS not written
   depends_on_option: use_external_bios
-  source_ref: "emulatorLauncher/Generators/SSF.Generator.cs:76-83, .emulationstation/es_features.cfg:20762-20767"
+  choices_from: ".emulationstation/es_features.cfg:20762-20767"
+  source_ref: "emulatorLauncher/Generators/SSF.Generator.cs:76-83"
 - emulator: yabasanshiro
   build: standalone
   kind: fixed_name
@@ -5119,7 +5125,8 @@ launchers:
     \ exists"
   fails_when_missing: General\Bios not written
   depends_on_option: yabasanshiro_force_bios
-  source_ref: "emulatorLauncher/Generators/Yabasanshiro.Generator.cs:123-131, .emulationstation/es_features.cfg:22724-22729"
+  choices_from: ".emulationstation/es_features.cfg:22724-22729"
+  source_ref: "emulatorLauncher/Generators/Yabasanshiro.Generator.cs:123-131"
 - emulator: ymir
   build: standalone
   kind: fixed_name
@@ -5144,7 +5151,8 @@ launchers:
     \ check"
   fails_when_missing: path written without an existence check
   depends_on_option: ymir_force_bios
-  source_ref: "emulatorLauncher/Generators/Ymir.Generator.cs:120-125, .emulationstation/es_features.cfg:22784-22788"
+  choices_from: ".emulationstation/es_features.cfg:22784-22788"
+  source_ref: "emulatorLauncher/Generators/Ymir.Generator.cs:120-125"
 - emulator: ymir
   build: standalone
   kind: passes_path
@@ -5222,7 +5230,8 @@ launchers:
   fails_when_missing: ApplicationException 'BIOS file <pcsx2Bios> does not exist in
     '<ps2BiosFolder>'.'
   depends_on_option: lrps2_bios
-  source_ref: "emulatorLauncher/Generators/LibRetro.CoreOptions.cs:3695-3704, .emulationstation/es_features.cfg:5875-5881"
+  choices_from: ".emulationstation/es_features.cfg:5875-5881"
+  source_ref: "emulatorLauncher/Generators/LibRetro.CoreOptions.cs:3695-3704"
 - emulator: pcsx2
   build: libretro
   kind: scans_dir
@@ -5635,8 +5644,10 @@ launchers:
   search_dir: bios
   passes_to: "xemu.toml [sys.files] flashrom_path=<bios>/<value>, default Complex_4627.bin"
   fails_when_missing: path written without an existence check
-  depends_on_option: xemu_flashrom
-  source_ref: "emulatorLauncher/Generators/Xemu.Generator.cs:286-289, .emulationstation/es_features.cfg:22081-22085"
+  depends_on_option: "xemu_flashrom, not (emulator == \"xemu-chihiro\" || system ==\
+    \ \"chihiro\")"
+  choices_from: ".emulationstation/es_features.cfg:22081-22085"
+  source_ref: "emulatorLauncher/Generators/Xemu.Generator.cs:48, 284-289"
 - emulator: xemu
   build: standalone
   kind: names_searched
@@ -5752,7 +5763,8 @@ launchers:
   - coco3h
   - coco3p
   - coco3ph
-  source_ref: "emulatorLauncher/Generators/Xroar.Generator.cs:76-80, .emulationstation/es_features.cfg:22650-22659"
+  choices_from: ".emulationstation/es_features.cfg:22650-22659"
+  source_ref: "emulatorLauncher/Generators/Xroar.Generator.cs:76-80"
 - emulator: xroar
   build: standalone
   kind: passes_path