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/metrics.yaml

@@ -0,0 +1,19 @@
+# General dumping-ground for UI element sizes, etc.
+
+Metrics:
+	FactionSuffix-allies: allies
+	FactionSuffix-england: allies
+	FactionSuffix-france: allies
+	FactionSuffix-germany: allies
+	FactionSuffix-spain: allies
+	FactionSuffix-greece: allies
+	FactionSuffix-turkey: allies
+	FactionSuffix-russia: soviet
+	FactionSuffix-soviet: soviet
+	FactionSuffix-ukraine: soviet
+	IncompatibleProtectedGameColor: B22222
+	IncompatibleVersionColor: D3D3D3
+	TextfieldColorHighlight: 562020
+	PlayerJoinedSound: PlayerJoined
+	LobbyOptionChangedSound: LobbyOptionChanged
+	PlayerLeftSound: PlayerLeft