feat: add RetroArch cores download script with full system coverage

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

scripts/core-list.txt

@@ -0,0 +1,60 @@
+81_libretro.so
+atari800_libretro.so
+bluemsx_libretro.so
+cap32_libretro.so
+daphne_libretro.so
+dosbox_pure_libretro.so
+easyrpg_libretro.so
+ecwolf_libretro.so
+fake08_libretro.so
+fbneo_libretro.so
+fceumm_libretro.so
+flycast_libretro.so
+freechaf_libretro.so
+freeintv_libretro.so
+fuse_libretro.so
+gambatte_libretro.so
+gearcoleco_libretro.so
+genesis_plus_gx_libretro.so
+handy_libretro.so
+hatari_libretro.so
+lowresnx_libretro.so
+mame_libretro.so
+mednafen_pce_fast_libretro.so
+mednafen_pcfx_libretro.so
+mednafen_supergrafx_libretro.so
+mednafen_vb_libretro.so
+mednafen_wswan_libretro.so
+melonds_libretro.so
+mgba_libretro.so
+mupen64plus_next_libretro.so
+neocd_libretro.so
+nestopia_libretro.so
+np2kai_libretro.so
+o2em_libretro.so
+opera_libretro.so
+pcsx_rearmed_libretro.so
+picodrive_libretro.so
+pokemini_libretro.so
+potator_libretro.so
+ppsspp_libretro.so
+prboom_libretro.so
+prosystem_libretro.so
+puae_libretro.so
+px68k_libretro.so
+race_libretro.so
+sameduck_libretro.so
+scummvm_libretro.so
+snes9x_libretro.so
+stella_libretro.so
+tic80_libretro.so
+uzem_libretro.so
+vecx_libretro.so
+vemulator_libretro.so
+vice_x128_libretro.so
+vice_x64_libretro.so
+vice_xplus4_libretro.so
+vice_xvic_libretro.so
+virtualjaguar_libretro.so
+x1_libretro.so
+yabasanshiro_libretro.so

scripts/install-cores.sh

@@ -0,0 +1,26 @@
+#!/bin/bash
+# Download pre-compiled aarch64 libretro cores and package them as a tarball.
+set -e
+
+outdir="${1:-./artifacts}"
+cores_dir="$(mktemp -d)"
+trap 'rm -rf "$cores_dir"' 0
+
+base_url="https://raw.githubusercontent.com/christianhaitian/retroarch-cores/master/aarch64"
+target_dir="$cores_dir/home/emulation/.config/retroarch/cores"
+mkdir -p "$target_dir"
+
+while IFS= read -r core; do
+    [ -z "$core" ] && continue
+    [[ "$core" =~ ^# ]] && continue
+    echo "Downloading $core..."
+    if wget -q "$base_url/${core}.zip" -O "/tmp/${core}.zip" 2>/dev/null; then
+        unzip -o -q "/tmp/${core}.zip" -d "$target_dir/"
+        rm -f "/tmp/${core}.zip"
+    else
+        echo "Warning: Failed to download $core, skipping"
+    fi
+done < scripts/core-list.txt
+
+tar cf "$outdir/cores.tar" -C "$cores_dir" .
+echo "Cores tarball created at $outdir/cores.tar"