feat: 4-source verified emulator profiles (A-E cores)

33 emulator profiles created or updated with systematic
verification against libretro docs, .info, core source,
and original emulator source code.

New profiles: bsnes-jg, bsnes2014, bsnes_cplusplus98,
bsnes_hd_beta, bsnes_mercury, citra2018, citra_canary.

Key fixes:
- dosbox_svn/svn_ce: not aliases of dosbox_core (no MUNT)
- beetle_psx: alt_names renamed to aliases (field bug)
- dolphin: added 15 Realtek BT firmware for Wiimote passthrough
- dosbox_core: added CM-32LN, 13 split ROM pairs for standalone
- duckstation: type standalone+libretro, 106 BIOS verified
- snes9x/np2kai: formal aliases for alternate filenames

emulators/dinothawr.yml

@@ -6,9 +6,24 @@ core_version: "v1.0"
 display_name: "Dinothawr"
 cores: [dinothawr]
 systems: []
+
+notes: |
+  Puzzle game by the libretro team. Push blocks on ice.
+  Game data (TMX levels, sprites, music) needed for the core to work.
+
+  Two loading modes:
+  1. Load dinothawr.game as content (data in content directory)
+  2. supports_no_game=true: loads from system_dir/dinothawr/
+     ref: libretro.cpp:267-271 —
+       game_path_dir = join(system_dir, "/", "dinothawr")
+       game_path = join(game_path_dir, "/", "dinothawr.game")
+
+  Buildbot provides Dinothawr.zip via Core System Files Downloader.
+  ref: buildbot.libretro.com/assets/system/Dinothawr.zip
+
+data_directories:
+  - ref: dinothawr
+    source_ref: "libretro.cpp:270-271"
+
 files: []
-notes: >
-  Puzzle game developed by the libretro team as a reference libretro core.
-  Push blocks on ice to solve puzzles. Game data (maps, sprites, music)
-  ships in the libretro repo and is loaded as content.
-  No BIOS, firmware, or system directory files required.
+# no BIOS/firmware — game data loaded via data_directories or content