move components/client to rt (runtime) directory

src/rt/elements/create.ts

@@ -0,0 +1,9 @@
+function create<T extends keyof HTMLElementTagNameMap>(element: T, className?: string): HTMLElementTagNameMap[T] {
+	const new_element = document.createElement(element)
+	if (className) {
+		new_element.className = className
+	}
+	return new_element
+}
+
+export default create