Emulating event bubble for DOMs inside web components

[NiuZhuang]

Hi J. Tangelder,

Here is my implementation to emulate event bubbles for DOMs inside web components. My previous solution was too simple. Please take a review.

1. It triggers touch events from composedPath()[0] to ev.target.
2. Adds vite as static server. Adds index.html for test manual pages.