fix: Update schematic format to KiCAD 9 and fix invalid UUIDs (#37)

- Update schematic version from 20230121 (KiCAD 7) to 20240101 (KiCAD 9)
- Replace invalid all-zeros UUIDs in template files with valid UUIDs
- Add post-copy UUID regeneration to ensure each project gets unique UUID
- Add UTF-8 encoding and Unix line endings for cross-platform compatibility

Fixes the root cause where templates were copied with invalid UUIDs and
outdated version format, causing KiCAD 9.0.x to reject the schematic files.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

python/templates/empty.kicad_sch

@@ -1,6 +1,6 @@
 (kicad_sch (version 20250114) (generator "KiCAD-MCP-Server")
 
-  (uuid 00000000-0000-0000-0000-000000000000)
+  (uuid b2c3d4e5-f6a7-4b8c-9d0e-1f2a3b4c5d6e)
 
   (paper "A4")