feat(roms): add Obsidian vault knowledge base for 75 library romhacks

build-romhack-vault.py generates pokemon-romhack-vault/: one note per hack
(YAML properties + tags + summary + links), an Index MOC (Dataview + static
table), a Types taxonomy, and per-platform MOCs. Dataset is the single source
of truth — edit + re-run to extend.

pokemon-romhack-vault/Hacks/Brown.md

@@ -0,0 +1,33 @@
+---
+title: "Pokémon Brown"
+platform: GB
+base: "Red"
+version: "1.1"
+status: "Complete"
+type: ["New Experience"]
+generation: "Gen 1+"
+library_path: "roms/gb/Hacks/Pokemon - Brown (Hack).gb"
+source: "https://www.pokecommunity.com/threads/pokemon-brown.27915/"
+added: 2026-06-06
+tags: ["hack", "platform/gb", "base/red", "status/complete", "type/newexperience"]
+---
+# Pokémon Brown
+
+> [!info] New Experience — **Complete**
+> Game Boy · base **Red** · version **1.1** · Gen 1+
+
+## Summary
+One of the oldest and most influential hacks. A brand-new Rijon region with new towns, gyms, and a custom dex built on Gen 1, by Koolboyman (who later made Prism).
+
+## Type
+[[Types#New Experience|New Experience]]
+
+## Links
+- Source / info: https://www.pokecommunity.com/threads/pokemon-brown.27915/
+- Lookup: https://duckduckgo.com/?q=Pok%C3%A9mon%20Brown%20rom%20hack
+
+## In the library
+- `roms/gb/Hacks/Pokemon - Brown (Hack).gb` on valhalla
+- Patch/source artifact archived under `/storage1/igir/romhacks/patches/`
+
+[[Index|← back to directory]]