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-content/installer/cnc95.yaml

@@ -0,0 +1,11 @@
+cnc95: C&C Gold (GDI or Nod Disc, English)
+	Type: Disc
+	IDFiles:
+		CONQUER.MIX: 833e02a09aae694659eb312d3838367f681d1b30
+	Install:
+		# C&C Desert Tileset:
+		ContentPackage@cncdesert:
+			Name: cncdesert
+			Actions:
+				Copy: .
+					^SupportDir|Content/ra/v2/cnc/desert.mix: DESERT.MIX