Translate TemplateComponent declaration

[F0rsaken]

Proposed API

defineTemplateComponent(() => {
	// similarly to defineComponent
	const { requestUpdate, ...componentContext } = useTemplateComponentContext();

	// or template
	render(html => {
		return html``;
	})
})

We may move from lit-html in search for more reliable or more supported templating engine, like f.ex. JSX syntax, but it needs further investigations.

But more than that, API is relativelty similar to new defineComponent, or maybe it even should be defineComponent that handles render hook