feat: platform-core registry for exact pack generation

resolve_platform_cores() links platforms to their cores via
three strategies: all_libretro, explicit list, system ID
fallback. Pack generation always includes core requirements
beyond platform baseline. Case-insensitive dedup prevents
conflicts on Windows/macOS. Data dir strip_components fixes
doubled paths for Dolphin and PPSSPP caches.

platforms/retrobat.yml

@@ -5,6 +5,165 @@ source: "https://raw.githubusercontent.com/RetroBat-Official/emulatorlauncher/ma
 base_destination: bios
 hash_type: md5
 verification_mode: md5
+cores:
+  - 81
+  - a5200
+  - abuse
+  - arduous
+  - atari800
+  - azahar
+  - bennugd
+  - bk
+  - bluemsx
+  - bsnes
+  - bstone
+  - cannonball
+  - cap32
+  - catacombgl
+  - cdogs
+  - cemu
+  - cgenius
+  - citron
+  - clk
+  - corsixth
+  - demul
+  - devilutionx
+  - dhewm3
+  - dice
+  - dolphin
+  - dosbox_pure
+  - dxx-rebirth
+  - easyrpg
+  - ecwolf
+  - eduke32
+  - eka2l1
+  - emuscv
+  - etlegacy
+  - fake08
+  - fallout1-ce
+  - fallout2-ce
+  - fbneo
+  - fceumm
+  - flatpak
+  - flycast
+  - freechaf
+  - freeintv
+  - fury
+  - fuse
+  - gambatte
+  - gearsystem
+  - genesisplusgx
+  - glide64mk2
+  - gong
+  - gsplus
+  - gw
+  - gzdoom
+  - hatari
+  - hcl
+  - hurrican
+  - hypseus-singe
+  - ikemen
+  - ioquake3
+  - iortcw
+  - jazz2-native
+  - lindbergh-loader
+  - lowresnx
+  - lutro
+  - mame
+  - mame078plus
+  - mednafen_lynx
+  - mednafen_ngp
+  - mednafen_supergrafx
+  - mednafen_wswan
+  - melonds
+  - mgba
+  - minivmac
+  - model2emu
+  - moonlight
+  - mrboom
+  - neocd
+  - np2kai
+  - nxengine
+  - o2em
+  - odcommander
+  - openbor6412
+  - openjazz
+  - openjk
+  - openjkdf2
+  - openmohaa
+  - opera
+  - pce_fast
+  - pcfx
+  - pcsx2
+  - pcsx_rearmed
+  - pd777
+  - picodrive
+  - play
+  - pokemini
+  - potator
+  - ppsspp
+  - prboom
+  - prosystem
+  - puae
+  - px68k
+  - pygame
+  - pyxel
+  - quasi88
+  - raze
+  - reminiscence
+  - rpcs3
+  - ruffle
+  - samcoupe
+  - sameduck
+  - scummvm
+  - sdlpop
+  - sh
+  - shadps4
+  - snes9x
+  - solarus
+  - sonic2013
+  - sonic3-air
+  - sonic-mania
+  - steam
+  - stella
+  - superbroswar
+  - supermodel
+  - taradino
+  - tgbdual
+  - theforceengine
+  - theodore
+  - thextech
+  - tic80
+  - tr1x
+  - tr2x
+  - tsugaru
+  - tyrian
+  - tyrquake
+  - uqm
+  - uzem
+  - vb
+  - vecx
+  - vice_x64
+  - vircon32
+  - virtualjaguar
+  - vita3k
+  - vox_official
+  - vpinball
+  - wasm4
+  - wine-tkg
+  - x1
+  - x128
+  - x16emu
+  - xash3d_fwgs
+  - xemu
+  - xenia-canary
+  - xpet
+  - xplus4
+  - xrick
+  - xvic
+  - yabasanshiro
+  - yquake2
+  - zc210
 systems:
   3do:
     files: