refactor(component): render react element into lit (#6124)

See docs in https://insider.affine.pro/share/af3478a2-9c9c-4d16-864d-bffa1eb10eb6/oL1ifjA4rKv7HRn5nYzIF

This PR also enables opening split view by ctrl-click a page link in a doc.

packages/frontend/component/src/lit-react/index.ts

@@ -1 +1,2 @@
 export { createComponent as createReactComponentFromLit } from './create-component';
+export * from './lit-portal';