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>

mods/cnc/maps/gdi02/map.ftl

@@ -0,0 +1,5 @@
+## rules.yaml
+briefing = 
+    Defend your position, deploy the MCV, then build a sizable force to search out and destroy the Nod base in the area.
+    
+    All Nod units and structures must be either destroyed or captured to complete the objective.