feat: add 10 emulator profiles (119-series batch 4)

bennugd (game engine, no BIOS), cruzes (puzzle game, no BIOS),
dice (discrete arcade, no BIOS), ishiiruka (Dolphin fork, same BIOS),
mkxp_z (RPG Maker, 3 RTP dirs), onscripter (VN engine, no BIOS),
qemu (55 firmware files! SeaBIOS/VGA/iPXE/OpenBIOS/OpenSBI),
rustation (PS1 Rust, 22 BIOS by SHA-256), rvvm (RISC-V, OpenSBI),
reminiscence (Flashback engine, game data only)

135 total profiles.

emulators/dice.yml

@@ -0,0 +1,67 @@
+emulator: DICE
+type: libretro
+source: "https://github.com/mittonk/dice-libretro"
+cores:
+  - dice
+systems:
+  - discrete-arcade
+
+notes: |
+  DICE (Discrete Integrated Circuit Emulator) emulates early arcade hardware
+  built entirely from discrete logic components, with no CPU. dice-libretro is
+  a libretro port by Ken Mitton, based on upstream DICE by Adam B.
+
+  No BIOS or firmware files required. The .info file declares firmware_count = 0.
+
+  Games fall into two categories:
+    - ROM-based: shipped as MAME-style ZIP archives (filename matters).
+      The core loads the ZIP passed by the frontend and matches individual ROM
+      chips by CRC32 (chips/rom.cpp:41-218, RomDesc::get_data). If a chip's
+      CRC does not match, the core walks all entries in the archive looking for
+      a CRC match or alt_crc match.
+    - ROM-less: games like Pong, Breakout, Rebound whose original PCBs had no
+      ROM at all. These use .dmy dummy launcher files (empty placeholders) to
+      tell RetroArch which game to start.
+
+  retro_get_system_info (libretro.cpp:122-137) sets need_fullpath = true,
+  block_extract = true, valid_extensions = "zip|dmy|k1|a1|6c|c6|d2|s1|f4|a4|
+  1da|da1|C4|4c|4d|d7|d4". The unusual extensions are raw ROM chip dumps for
+  individual games (e.g. .k1 for antiaircraft, .a1 for attack).
+
+  dice.cpp:42-66 strips any "#inner.rom" suffix from the path (for ROM
+  managers that expose zip contents) and passes the zip path to
+  RomDesc::set_zip_filename.
+
+  retro_init (libretro.cpp:50-63) retrieves RETRO_ENVIRONMENT_GET_SYSTEM_DIRECTORY
+  but uses it only for the retro_base_directory variable, not for loading any
+  system files.
+
+  Games with ROMs (10 titles):
+    antiaircraft.zip  - 1 ROM chip (k1)
+    attack.zip        - 6 ROM chips (a1, b1, c1, d1, j6, k6), each with alt_crc
+    cleansweep.zip    - 3 ROM chips (6c, d7, k3)
+    crashnscore.zip   - 6 ROM chips (d2, e2, f6, f7, p6, p7)
+    indy4.zip         - 4 ROM chips (s1, s2, c1, c2)
+    jetfighter.zip    - 6 ROM chips (a4, j1, j5, k5, m1, r5)
+    sharkjaws.zip     - 2 ROM chips (1da/da1, 1db/db1)
+    steeplechase.zip  - 2 ROM chips (C4, D4); bugle ROM c8 dump missing
+    stuntcycle.zip    - 2 ROM chips (4d, 1fh)
+    wipeout.zip       - 2 ROM chips (d4, g7)
+
+  ROM-less games (11 titles, use .dmy dummy files):
+    breakout, crossfire, gotcha, hiway, pinpong, pong, pongdoubles,
+    quadrapong, rebound, spacerace, tvbasketball
+
+files: []
+
+analysis:
+  rom_loading:
+    method: "MAME-style ZIP, matched by CRC32 per RomDesc"
+    source_ref: "chips/rom.cpp:41-218"
+    zip_handling: "unzip library (unzip/), opened via libretro_zip_filename"
+  game_count: 21
+  rom_games: 10
+  romless_games: 11
+  filesystem_access: false
+  system_directory_used: false
+  bios_required: false