feat(web/wasm): wasm demo web page

[aaadamgo]

Revamped the front-end with a fresh design. Some of the javascript has been updated, generally to add / remove classes to show/hide certain elements, but none of the core functions have been touched.

[sergey-melnychuk]

@aaadamgo , thank you for the pull request!

I left some comments/questions around the code, please let me know if I misinterpret any changes.

@ICavlek @LKozlowski PTAL.

[ICavlek]

Nice work on the design, it really is a next step towards making the page look nicer and user friendly. Regarding the comments Sergey made, I agree with everything he has written and therefore I won't go deeper there. I will rather make comments and observations based on the design changes.

First of all, I like how the first page gives the impression how the whole workflow in Beerus should be done. What I had some UX issues is that I didn't have the impression that this was the major "help" page. I wasn't guided by the page and maybe the reason is that there was no box at the end that says "You can hit the Close button now and start working with Beerus". Also there might be another box that says to open terminal by clicking "+" to start interacting.

Next thing, ESC works, clicking outside not really and I don't know where it might work. Maybe directing to "Close" could be better. Or moving this whole box at the end of instructions.

I think that hiding alchemy key as it was in the previous version should be used, the one with black circles instead of characters.

In the end, these "Make call", "Get State" and all other "buttons" in the help page look not as attractive as the ones you did in the terminal. Same thing goes for the "Info" button, in the box where Click "Info" button to show this message again is, maybe that nice "i in circle" could be. This isn't crucial change for now, but it did catch my eye.

I hope that this feedback will help on the future improvements. It is a completely different perspective from yours, where you have been working all the time on it and knowing what it contains and where it is located, and me, first time as a user seeing it and having first interactions :)