Add web example

[zoontek]

Summary

Following #1294

I tried to keep the changes as minimal as possible, but I had to:

• Remove gradle from .gitignore (not supposed to be here)
• Add jsxBracketSameLine until prettier is updated (the current version does not support it, it clashes with prettier-eslint and it's impossible to work)
• Delete custom Modal (now included in react-native-web)
• Lint the codebase
• Fix some typescript errors
• Move getHasTouchableProperty to the web implem (it's only used here) + remove any
• Delete SnackImageCompat (doesn't work at all, use inheritance other composition, results in a Super expression must either be null or a function error)

And as mentioned in the original PR:

• The PanResponder example does not work:

• The focus issue is sure fixed, but pressability just don't work anymore on web:

Screen.Recording.2022-03-04.at.13.20.25.mov

Checklist

• I have tested this on a device and a simulator
• I added documentation in README.md
• I updated the typed files (typescript)
• I added a test for the API in the __tests__ folder

[WoLewicki]

I added some comments, please answer them and I think we can merge it then. Thanks for your contribution 🎉

[WoLewicki]

LGTM 🎉