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-05b/map.ftl

@@ -0,0 +1,9 @@
+## rules.yaml
+briefing = 
+    Rescue Tanya.
+    
+    Once disguised, your spy can move past any enemy unit, except dogs, without being detected. Direct him into the weapons factory located at a nearby Soviet base where he can hijack a truck and free Tanya.
+    
+    With Tanya's help, take out the air defenses on the island so a Chinook can arrive to rescue her.
+    
+    Then destroy all remaining Soviet buildings and units.