Refactor navigation to community/user pages, and fixes to iOS swipe back not working properly

[hjiangsu]

Pull Request Description

• Refactors some code which handles navigation to CommunityPage/UserPage
  • navigateToCommunityPage and navigateToUserPage replaces the previous functions for navigating to community/user pages by name. It is now more generic and will accept the name or the id of the community/user
• Increased width for swipeable page route detection
• Moved swipeable page route offset back to default for iOS, but kept it the same for Android
• CreateCommentPage and CreatePostPage are no longer full screen swipe to go back. This fixes an issue where it is really difficult to horizontally scroll on the markdown options at the bottom of the screen

Test out the following if possible!

• Navigating to community/user pages from all the possible places (from long press actions, tapping on usernames/communities, user and community sidebars, etc)
• Test out comment swipe detection to see if that's been improved (hopefully should trigger accidental comment swipes less often)

Issue Being Fixed

Issue Number: N/A

Screenshots / Recordings

Checklist

• Did you update CHANGELOG.md?
• Did you use localized strings where applicable?
• Did you add semanticLabels where applicable for accessibility?

[micahmo]

Let us know if this is ready for review!

[hjiangsu]

@micahmo Feel free to test this out! I think its pretty much good

[micahmo]

The Code LGTM. I tested a few scenarios and they all worked fine!

[micahmo]

Do we even need these wrapper functions any more, or could we just put navigateToCommunityPage right in the tap handler?

[hjiangsu]

Alright, I'll go ahead and merge it in! Let me know if you encounter anything though 😅