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>

glsl/postprocess_tint.frag

@@ -0,0 +1,14 @@
+#version {VERSION}
+#ifdef GL_ES
+precision mediump float;
+#endif
+
+uniform vec3 Tint;
+uniform sampler2D SourceTexture;
+out vec4 fragColor;
+
+void main()
+{
+	vec4 c = texelFetch(SourceTexture, ivec2(gl_FragCoord.xy), 0);
+	fragColor = vec4(Tint, c.a) * c;
+}