fix: place amiberry ROMs in rom_path

The standalone Amiberry scans rom_path, ROMs below its content root by
default, for the ROMs of its database, without descending into
folders, and reads rom.key beside the Kickstart and the MT-32 ROMs
from mt32-roms. Those entries now carry standalone_path relative to
it, the four Kickstart labels holding slashes flattened. The kick*.rom
names stay the libretro build's.

Batocera's config_directories reads its rom_path save, KNULLI reuses
it. On Batocera, KNULLI and RetroPie the ROMs move from the BIOS root
to bios/amiga.

scripts/scraper/batocera_launchers.py

@@ -901,8 +901,13 @@ def environment_directories(cg: Configgen) -> list[Launcher]:
 
 # Generators that hand the emulator a /userdata/bios directory through its
 # configuration: a line written to the file it reads (openMSX's script.tcl
-# filepool entries, xroar.conf rompath) or a key saved to it.
-CONFIG_DIRECTORY_GENERATORS = ("openmsx.openmsxGenerator", "xroar.xroarGenerator")
+# filepool entries, xroar.conf rompath) or a key saved to it (amiberry.conf
+# rom_path).
+CONFIG_DIRECTORY_GENERATORS = (
+    "openmsx.openmsxGenerator",
+    "xroar.xroarGenerator",
+    "amiberry.amiberryGenerator",
+)
 
 
 def config_directories(

scripts/scraper/knulli_launchers.py

@@ -87,8 +87,8 @@ ES_FEATURES = "package/emulationstation/knulli-es-system/es_features.yml"
 
 # Batocera's extractors that read KNULLI's generators unchanged.
 # The generators of Batocera's config_directories that KNULLI keeps in the
-# same shape: openMSX's filepool lines.
-CONFIG_DIRECTORY_GENERATORS = ("openmsx.openmsxGenerator",)
+# same shape: openMSX's filepool lines and amiberry's rom_path.
+CONFIG_DIRECTORY_GENERATORS = ("openmsx.openmsxGenerator", "amiberry.amiberryGenerator")
 
 
 def knulli_config_directories(cg: Configgen) -> list[Launcher]:
@@ -373,7 +373,6 @@ GENERIC_SITES = (
     GenericSites("gsplus/gsplusGenerator.py", "passes_path"),
     GenericSites("tsugaru/tsugaruGenerator.py", "passes_path"),
     GenericSites("scummvm/scummvmGenerator.py", "passes_path"),
-    GenericSites("amiberry/amiberryGenerator.py", "passes_path"),
     GenericSites("fsuae/fsuaeGenerator.py", "passes_path"),
     GenericSites("mame/mameGenerator.py", "passes_path"),
     GenericSites("fpinball/fpinballGenerator.py", "passes_path"),