v0.3.8

Summary

• Upgrade map editor region workflow with toolbar draw mode, region selection, drag move, and handle-based resize.
• Add runtime script region debug overlay and improve region condition editing/synchronization.
• Add map_script_region_sample.json for enter/stay/exit trigger testing.

Test Plan

• Build map_editor and verify no compile errors.
• Build RTS_p5 and verify no compile errors.
• In map editor: create region by drag, move it, resize by handles, then undo/redo.
• In game: load sample map and confirm region triggers and overlay behavior.