LibWeb: Resolve percentages in <angular-color-stop-list> as angles

Author: https://github.com/Calme1709
Commit: cc2c8e8615
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/6497
Reviewed-by: https://github.com/tcl3 ✅

Libraries/LibWeb/CSS/Parser/Parser.h

@@ -564,6 +564,7 @@ private:
         DescriptorID descriptor;
     };
     enum SpecialContext : u8 {
+        AngularColorStopList,
         ShadowBlurRadius,
         TranslateZArgument
     };