Lazy load and move all functions to web workers

[tyohan]

Just trying to think about what the things that this web component library can do differently from other web component library. Some ideas that might be interesting to explore are:

• lazy load the component with dynamic import. But it might be break build tool on tree shaking.
• utilize web workers by moving all the functions to web workers, only rendering that will be run on main thread.

I put this issue just as a note what might be possible to do with this library.