LibWeb: Add parsing support for the remaining transform functions

Author: https://github.com/skyrising
Commit: c4f46893f6
Pull-request: https://github.com/SerenityOS/serenity/pull/13093
Reviewed-by: https://github.com/AtkinsSJ

Userland/Libraries/LibWeb/CSS/StyleProperties.cpp

@@ -335,6 +335,8 @@ Vector<CSS::Transformation> StyleProperties::transformations() const
                 values.append({ transformation_value.to_length() });
             } else if (transformation_value.is_numeric()) {
                 values.append({ transformation_value.to_number() });
+            } else if (transformation_value.is_angle()) {
+                values.append({ transformation_value.as_angle().angle().to_degrees() });
             } else {
                 dbgln("FIXME: Unsupported value in transform!");
             }