Add examples for material UI

[mayank1513]

Add an example showing how to use this library with material UI.

Hints:
→ Add Core and ServerTarget components as usual. Required only for styles other than those handled by Material UI.
→ Set Material UI theme's mode using resolvedMode from useMode hook.
→ Create Switch or Autocomplete to select from "dark", "light" or "system" mode and set it using setMode from useMode hook.