Update hiding-tabbar-in-screens with style option.md

[FrederickEngelhardt]

• adds a second option using react-native styles to hide the bottom bar.
• The current example (moving the stack above the tabs) shows ideal use cases while the second option works when those ideal use cases are not an option.

Let me know if this needs to be a separate doc. I feel like it belongs here, but maybe we can do more with linking references to reference the second option directly.

READ ME PLEASE

TL;DR: Make sure to add your changes to versioned docs

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[FrederickEngelhardt]

@satya164 Are you able to merge this? This doc update gives an example how to hide bottom bar vs the previous example was a tutorial how to not hide it by refactoring a screen approach.