Initial commit: OpenRA game engine

Fork from OpenRA/OpenRA with one-click launch script (start-ra.cmd)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

OpenRA.Utility/Properties/launchSettings.json

@@ -0,0 +1,11 @@
+{
+  "profiles": {
+    "OpenRA.Utility": {
+      "commandName": "Project",
+      "commandLineArgs": "all --docs {DEV_VERSION}",
+      "environmentVariables": {
+        "ENGINE_DIR": ".."
+      }
+    }
+  }
+}