MyProfile updates

[aerickson14]

What's changed

The main change in this PR is in MyProfile. Previously it was requiring a contentView to be passed in which would contain the bulk of the profile UI, which was mostly defined in MyProfileInfoAndTweets. After seeing if I could swap the two, it became apparent why it may have been done this way since MyProfileInfoAndTweets relies on feed information and lives in the TimelineUI micro framework. Trying to simply move MyProfileInfoAndTweets into the Profile framework would not work because it would create a circular dependency.

What I was able to do instead was extract the bulk of the profile UI back into MyProfile and then optionally provide additional content that would still exist in the scrollview on my profile. That way MyProfileInfoAndTweets can call MyProfile and provide the ForYouFeedsView as its footer content as intended.

Other changes

• Updated EditProfileView removing unused variables and some minor label changes.
• Enabled previews in any of the views that made sense (I hope that's ok!) Although previews don't have the best reputation, and can be tricky to enable when using environment variables I think they are a super valuable way to ensure you're writing modular code.
• Minor naming updates
• Created convenience computed variables in ProfileInfoViewModel that help making the code in the view easier to read
• Updated SettingsView to initially populate with the current logged in user, as well as extracted out each row/view for readability

How to test

• After logging in, tap on the profile image in the top left as before to see the MyProfile view. It should load with basic profile information as well as any of the current user's tweets (as it did before)
• Tapping the settings gear icon should show the updates to the Settings page

• Navigating back to the profile and then into "Edit Profile" should load and display as it did before.