feat: add emulator profiles (119-series batch 6 partial)

dolphin_launcher (stub launcher), oberon (RISC, bootloader embedded),
17 test cores (00_example through vidtest), 17 game/utility cores
(2048 through vaporspec), bennugd, boytacean, emux_chip8, fake08,
jaxe, lowresnx, opentyrian, openlara, squirreljme, vitaquake2, xrick

182 total profiles. 6 agents failed (API 500), will retry.

emulators/test.yml

@@ -0,0 +1,15 @@
+emulator: test
+type: test
+source: "https://github.com/libretro/libretro-samples"
+cores:
+  - test
+systems: []
+
+notes: |
+  Basic test core from libretro-samples. Minimal software-rendered core
+  used for sanity-checking the libretro frontend loop (frame timing, input
+  polling, audio sample generation).
+
+  No system files, BIOS, or firmware required. Not an emulator.
+
+files: []