Replace MPQ runtime with loose file asset system

Extract assets from MPQ archives into organized loose files indexed by
manifest.json, enabling fully parallel reads without StormLib serialization.
Add asset_extract and blp_convert tools, PNG texture override support.

src/rendering/minimap.cpp

@@ -267,7 +267,7 @@ void Minimap::parseTRS() {
     if (trsParsed || !assetManager) return;
     trsParsed = true;
 
-    auto data = assetManager->getMPQManager().readFile("Textures\\Minimap\\md5translate.trs");
+    auto data = assetManager->readFile("Textures\\Minimap\\md5translate.trs");
     if (data.empty()) {
         LOG_WARNING("Failed to load md5translate.trs");
         return;