Performance optimization

[ansh]

This PR does the following:

• Creates scripts for automated performance testing using Flashlight and Maestro
  • Flashlight only works for Android
  • Maestro allows us to write tests with YAML files instead and avoids the issues that come with using Detox and React Native
• Fixes warnings in eas.json
• Removes stray console.logs with a plugin in production code to help JS thread (as recommended by RN dos)
• Set up Sentry performance monitoring to get performance insights in production applications
• Moves shell animations to Reanimated and wraps them in a mobx reaction to help avoid re-renders
• Moves shared shell animations to centralized hook
• Moves LoadLatestBtn to an animation instead of dynamically changing styles and re-rendering the component
• Moves FeedPage out of Home and separates concerns of components
• Re-write some logic of Empty screens and renderItem in Feed and FeedPage so we don't unnecessarily pass components down when not required

[gaearon]

the Reanimated parts lgtm, but haven't tested

[pfrazee]

Load more btn lost it's alignment on desktop web

[pfrazee]

I fixed the load more and FAB behaviors on desktop

Last one, on web tablet the feeds pager tabs are off

[pfrazee]

Those are the only issues I saw, scroll perf seems definitely stronger on web