Quaternius weapons, input fixes, sound & path fixes

- Added 6 Quaternius weapon models (Pistol, Revolver, Rifle, Shotgun, P90, SniperRifle)
- Created weapon resource files with balanced stats
- Wired Pistol + Rifle into player.tscn replacing Kenney blasters
- Fixed WASD input (matched input map action names)
- Fixed Escape key toggles mouse capture
- Added Audio autoload singleton
- Fixed broken sound asset paths across all scripts
- Fixed all scene ext_resource text paths (nested under assets/kenney-fps/)
- Fixed all .import source_file paths
- Deleted stale .import files (will be regenerated by editor on open)

package/dist/tools/autoload-tools.d.ts.map

@@ -0,0 +1 @@
+{"version":3,"file":"autoload-tools.d.ts","sourceRoot":"","sources":["../../src/tools/autoload-tools.ts"],"names":[],"mappings":"AACA,OAAO,KAAK,EAAE,eAAe,EAAE,cAAc,EAAE,MAAM,0BAA0B,CAAC;AAkBhF,eAAO,MAAM,uBAAuB,EAAE,cAAc,EAqEnD,CAAC;AAIF,wBAAgB,mBAAmB,CAAC,IAAI,EAAE,eAAe;;;;;;;;;;;EAcxD;AAED,wBAAgB,iBAAiB,CAAC,IAAI,EAAE,eAAe;;;;;;;;;;;EA+CtD;AAED,wBAAgB,oBAAoB,CAAC,IAAI,EAAE,eAAe;;;;;;;;;;;EA2BzD;AAED,wBAAgB,oBAAoB,CAAC,IAAI,EAAE,eAAe;;;;;;;;;;;EAsCzD"}