LibWeb/SVG: Stub SVGTransform.angle

Author: https://github.com/jamierocks
Commit: c102630a59
Pull-request: https://github.com/SerenityOS/serenity/pull/24231
Reviewed-by: https://github.com/MacDue ✅

Userland/Libraries/LibWeb/SVG/SVGTransform.h

@@ -32,6 +32,7 @@ public:
     };
 
     Type type();
+    float angle();
 
 private:
     SVGTransform(JS::Realm& realm);