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/Crystal Clear.md

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+---
+title: "Pokémon Crystal Clear"
+platform: GBC
+base: "Crystal"
+version: "2.5.7"
+status: "Complete"
+type: ["New Experience", "QoL"]
+generation: "Gen 1–2"
+library_path: "roms/gbc/Hacks/Pokemon - Crystal Clear (Hack).gbc"
+source: "https://www.pokecommunity.com/threads/pokemon-crystal-clear.382197/"
+added: 2026-06-06
+tags: ["hack", "platform/gbc", "base/crystal", "status/complete", "type/newexperience", "type/qol"]
+---
+# Pokémon Crystal Clear
+
+> [!info] New Experience · QoL — **Complete**
+> Game Boy Color · base **Crystal** · version **2.5.7** · Gen 1–2
+
+## Summary
+Open-world Crystal — pick any starter, tackle gyms in any order, roam Johto+Kanto freely. A landmark open-world take on Gen 2 by ShockSlayer.
+
+## Type
+[[Types#New Experience|New Experience]] [[Types#QoL|QoL]]
+
+## Links
+- Source / info: https://www.pokecommunity.com/threads/pokemon-crystal-clear.382197/
+- Lookup: https://duckduckgo.com/?q=Pok%C3%A9mon%20Crystal%20Clear%20rom%20hack
+
+## In the library
+- `roms/gbc/Hacks/Pokemon - Crystal Clear (Hack).gbc` on valhalla
+- Patch/source artifact archived under `/storage1/igir/romhacks/patches/`
+
+[[Index|← back to directory]]