feat: add Playnite setup script for PC windows hacks

Registers the Game.exe launcher emulator and RomM pc_windows mapping with AutoExtract.

README.md

@@ -23,6 +23,7 @@ served by the RomM stack (`roms.ginnoir.com`) — deployed from `homelabstack`
 | `scripts/romhack-apply.py` | Apply a single IPS/BPS/UPS patch to a base ROM with checksum verification. |
 | `scripts/romhack-pc-migrate.py` | Place the PC/Windows fan-games (RPG-Maker/Essentials) from the scrape staging tree into RomM's `windows` platform so RomM catalogs + serves them like the console hacks. Dry-run default; `--apply` copies, repackaging `.rar`→`.zip`. Runs on valhalla. |
 | `scripts/launch-pc-hack.ps1` | Playnite custom-emulator launcher for the PC hacks: finds `Game.exe` in the RomM-downloaded folder, sets CWD, runs it. Runs on the Windows client. |
+| `scripts/setup-playnite-pc-hack.ps1` | One-shot Playnite setup: registers the custom emulator + RomM `pc_windows` mapping (AutoExtract, download dir). Playnite must be closed. |
 | `scripts/build-vault-mocs.py` | Regenerate the vault's static MOC tables + header counts (Index/Platforms/Bases) from the notes. Read-only on `Hacks/*.md`. Re-run after any note change. |
 | `scripts/scrape_match.py` | Match the Discord-scrape `metadata.json` entries to vault notes → `.scrape/_match_report.json` (curated-overlap / discord-match / unmatched). |
 | `scripts/enrich_vault.py` | Synthesize the scrape into notes: `backfill` (frontmatter for imports), `merge` (scrape into curated), `create` (new notes), `rebuild` (normalize import bodies). `--apply` writes; default dry-runs to `.scrape/_preview/`. |