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/Emerald Squared.md

@@ -0,0 +1,33 @@
+---
+title: "Pokémon Emerald Squared"
+platform: GBA
+base: "Emerald"
+version: "2.6.2"
+status: "Complete"
+type: ["Difficulty", "Vanilla+"]
+generation: "Gen 3"
+library_path: "roms/gba/Hacks/Pokemon - Emerald Squared (Hack).gba"
+source: "https://duckduckgo.com/?q=Pok%C3%A9mon%20Emerald%20Squared%20rom%20hack"
+added: 2026-06-06
+tags: ["hack", "platform/gba", "base/emerald", "status/complete", "type/difficulty", "type/vanilla+"]
+---
+# Pokémon Emerald Squared
+
+> [!info] Difficulty · Vanilla+ — **Complete**
+> Game Boy Advance · base **Emerald** · version **2.6.2** · Gen 3
+
+## Summary
+An enhanced, harder Emerald — rebalanced trainers and availability for a tougher Hoenn run.
+
+## Type
+[[Types#Difficulty|Difficulty]] [[Types#Vanilla+|Vanilla+]]
+
+## Links
+- Source: _(not catalogued — see lookup)_
+- Lookup: https://duckduckgo.com/?q=Pok%C3%A9mon%20Emerald%20Squared%20rom%20hack
+
+## In the library
+- `roms/gba/Hacks/Pokemon - Emerald Squared (Hack).gba` on valhalla
+- Patch/source artifact archived under `/storage1/igir/romhacks/patches/`
+
+[[Index|← back to directory]]