Add ability to bind typed arrays to script API

Note: Only replaced 2 instances to test, Node.get_children and TileMap.get_used_cells
Note: Will do a mass replace on later PRs of whathever I can find, but probably need
a tool to grep through doc.
Warning: Mono will break, needs to be fixed (and so do TypeScript and NativeScript, need to ask respective maintainers)

modules/visual_script/visual_script.h

@@ -272,6 +272,8 @@ protected:
 	static void _bind_methods();
 
 public:
+	bool inherits_script(const Ref<Script> &p_script) const;
+
 	// TODO: Remove it in future when breaking changes are acceptable
 	StringName get_default_func() const;
 	void add_function(const StringName &p_name);