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)

visual_script.cpp

@@ -1460,6 +1460,10 @@ VisualScript::VisualScript() {
 	is_tool_script = false;
 }
 
+bool VisualScript::inherits_script(const Ref<Script> &p_script) const {
+	return this == p_script.ptr(); //there is no inheritance in visual scripts, so this is enough
+}
+
 StringName VisualScript::get_default_func() const {
 	return StringName("f_312843592");
 }

visual_script.h

@@ -272,6 +272,8 @@ class VisualScript : public Script {
 	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);