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/Snakewood.md

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+---
+title: "Pokémon Snakewood"
+platform: GBA
+base: "Ruby"
+version: "—"
+status: "Complete"
+type: ["New Experience"]
+generation: "Gen 3 + fakemon"
+library_path: "roms/gba/Hacks/Pokemon - Snakewood (Hack).gba"
+source: "https://www.pokecommunity.com/threads/pokemon-snakewood.146749/"
+added: 2026-06-06
+tags: ["hack", "platform/gba", "base/ruby", "status/complete", "type/newexperience"]
+---
+# Pokémon Snakewood
+
+> [!info] New Experience — **Complete**
+> Game Boy Advance · base **Ruby** · version **—** · Gen 3 + fakemon
+
+## Summary
+A cult-classic zombie-apocalypse reimagining of Hoenn — surreal, dark-comedic, and famously weird. Largely complete.
+
+## Type
+[[Types#New Experience|New Experience]]
+
+## Links
+- Source / info: https://www.pokecommunity.com/threads/pokemon-snakewood.146749/
+- Lookup: https://duckduckgo.com/?q=Pok%C3%A9mon%20Snakewood%20rom%20hack
+
+## In the library
+- `roms/gba/Hacks/Pokemon - Snakewood (Hack).gba` on valhalla
+- Patch/source artifact archived under `/storage1/igir/romhacks/patches/`
+
+[[Index|← back to directory]]