Add GDScript template to RichTextEffect

modules/gdscript/editor/script_templates/RichTextEffect/default.gd

@@ -0,0 +1,17 @@
+# meta-description: Base template for rich text effects
+
+@tool
+class_name _CLASS_
+extends _BASE_
+
+
+# To use this effect:
+# - Enable BBCode on a RichTextLabel.
+# - Register this effect on the label.
+# - Use [_CLASS_ param=2.0]hello[/_CLASS_] in text.
+var bbcode := "_CLASS_"
+
+
+func _process_custom_fx(char_fx: CharFXTransform) -> bool:
+	var param: float = char_fx.env.get("param", 1.0)
+	return true