doc: Add default values to all properties

Thanks to @bojidar-bg's impressive work in #29380.

modules/visual_script/doc_classes/VisualScriptResourcePath.xml

@@ -9,7 +9,7 @@
 	<methods>
 	</methods>
 	<members>
-		<member name="path" type="String" setter="set_resource_path" getter="get_resource_path">
+		<member name="path" type="String" setter="set_resource_path" getter="get_resource_path" default="&quot;&quot;">
 		</member>
 	</members>
 	<constants>