feat(arma): extract the marker catalog from game files

- Add bun run markers:arma (src/tools/arma/extractMarkers.ts), which scans the
  game install and every DLC addons dir, merges CfgMarkers, CfgMarkerColors,
  CfgMarkerBrushes and CfgMarkerClasses with inheritance, resolves stringtable
  names, and converts marker icons to PNG.
- Commit the converted PNGs under public/arma/markers so production needs no
  game files.
- Add the pure, client-safe catalog lib in src/lib/arma-markers: generated
  catalog, case-insensitive lookups, the Arma marker model with validation,
  and SQF export helpers.

package.json

@@ -15,6 +15,7 @@
     "generate:version-info": "bun run src/scripts/generateVersionInfo.ts",
     "import:arma": "bun run src/tools/import/importArmaLibrary.ts",
     "icons:arma": "bun run src/tools/import/extractArmaIcons.ts",
+    "markers:arma": "bun run src/tools/arma/extractMarkers.ts",
     "version:bump": "bun run src/scripts/bumpVersion.ts",
     "lint": "cross-env NODE_OPTIONS=--no-deprecation next lint",
     "payload": "cross-env NODE_OPTIONS=--no-deprecation payload",