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/Elite Redux.md

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+---
+title: "Pokémon Elite Redux"
+platform: GBA
+base: "Emerald"
+version: "2.65.3b"
+status: "Ongoing"
+type: ["Expansion", "Difficulty"]
+generation: "Multi-gen"
+library_path: "roms/gba/Hacks/Pokemon - Elite Redux (Hack).gba"
+source: "https://www.hackdex.app/hack/elite-redux"
+added: 2026-06-06
+tags: ["hack", "platform/gba", "base/emerald", "status/ongoing", "type/expansion", "type/difficulty"]
+---
+# Pokémon Elite Redux
+
+> [!info] Expansion · Difficulty — **Ongoing**
+> Game Boy Advance · base **Emerald** · version **2.65.3b** · Multi-gen
+
+## Summary
+A theorycrafter's playground: every species gets multiple abilities, a vastly expanded movepool, and brutal fights. Deep team-building over story.
+
+## Type
+[[Types#Expansion|Expansion]] [[Types#Difficulty|Difficulty]]
+
+## Links
+- Source / info: https://www.hackdex.app/hack/elite-redux
+- Lookup: https://duckduckgo.com/?q=Pok%C3%A9mon%20Elite%20Redux%20rom%20hack
+
+## In the library
+- `roms/gba/Hacks/Pokemon - Elite Redux (Hack).gba` on valhalla
+- Patch/source artifact archived under `/storage1/igir/romhacks/patches/`
+
+[[Index|← back to directory]]