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/ra/maps/allies-02/map.ftl

@@ -0,0 +1,17 @@
+dropdown-difficulty =
+    .label = Difficulty
+    .description = The difficulty of the mission
+
+options-difficulty =
+    .easy = Easy
+    .normal = Normal
+    .hard = Hard
+    .tough = Real tough guy
+
+## rules.yaml
+briefing = 
+    A critical supply convoy is due through this area in 10 minutes, but Soviet forces have blocked the road in several places.
+    
+    Unless you can clear them out, those supplies will never make it to the front.
+    
+    The convoy will come from the northwest, and time is short, so work quickly.