DRAKHYSYS INFINITY TILESET WORKBENCH V4.8.8.48
MOS REFERENCE LOADING OPTIMIZATION + READ-ONLY CHITIN.KEY

MOS Editor / Creator changes:
- Fast startup: the MOS editor no longer parses the full chitin.key when the tab/window opens.
- chitin.key is strictly READ-ONLY in the MOS editor. The editor never rewrites, rebuilds, upgrades, or saves the KEY file.
- Built-in interface references (START3EE, START, STONEOPT, etc.), UI.MENU references, override MOS files, and an optional MOS.zip/folder remain available without scanning the KEY catalog.
- New explicit button: LOAD ALL GAME MOS REFERENCES (READ-ONLY chitin.key).
- Full chitin.key MOS reference discovery now runs on a background worker thread so the Qt interface stays responsive while it loads.
- Indeterminate progress indicator + status text show when the KEY catalog is being read.
- Selecting a new chitin.key path does not scan it automatically.
- Using paths from the UI editor does not scan chitin.key automatically.
- REFRESH LOCAL / UI REFERENCES remains fast and does not touch the KEY catalog.
- A previously loaded KEY reference list is merged into the browser until the user changes/reloads the KEY path.
- Loading one selected KEY-backed MOS/PVRZ resource is still allowed and reads only the requested resource; it does not modify chitin.key.

Saving/creating MOS files continues to write only the chosen output/override MOS resource.
