* feat: rewrite public UI component rendering using tunnels
* factor out into components
* comments
* fix variable naming
* fix not hiding welcomeScreen
* factor out AppFooter and memoize components
* remove `UIOptions.welcomeScreen` and render only from host app
* factor out tunnels into own file
* update changelog. Keep `UIOptions.welcomeScreen` as deprecated
* update changelog
* lint
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Co-authored-by: Aakansha Doshi <aakansha1216@gmail.com>
