[MM] Structure Compass

Structure Compass 1.0.0-beta2 - Changelog 

Bug Fixes 
- Fixed game freezes occurring during searches for dense structures such as Buried Treasure 
- Fixed an intermittent issue where the HUD and compass needle would not update after a structure was found, despite the chat message displaying correctly
- Fixed the structure list failing to load when the compass was actively searching

New Features
- Added a Stop Search button - the Search button now becomes Stop Search while a search is in progress, allowing you to cancel at any time

Improvements
- Reworked the structure search process. Candidate locations are now collected in the background using seed-based prediction and sorted by distance, so the nearest structures are verified first. This results in significantly faster searches across all structure types
- Starting a new search while one is already in progress now cleanly cancels the previous search instead of running both simultaneously
- Increased the default search radius from 100 to 300 chunks (~4800 blocks)