add feed picker view (UI only) #103

[bryanmontz]

Issues covered

https://github.com/verse-pbc/issues/issues/103

Description

1. Changes the Feed view's navigation titleView from the words "Accounts I Follow" to the Nos logo.
2. Adds the feed picker view, which is a horizontally scrolling list of buttons to select the feed the user wants to see. This is currently non-functional and includes only "Following" and all the user's relays.

Designs:
https://www.figma.com/design/9U8xJlfBllvblDVN2FAFK0/Nos---Work-Sheets?node-id=159-3686&m=dev

To be added in a following PR:

1. lists
2. actually make the contents of the feed change based on selection

Screenshots/Video

Before	After

Compare the designs (left) and the implementation in the simulator (right):

[mplorentz]

Looks good! I noticed that the selected feed name "pops" a little when you tap on it because the text is bold and the padding increases a bit. I think a little animation on change would be a nice touch.

[bryanmontz]

Looks good! I noticed that the selected feed name "pops" a little when you tap on it because the text is bold and the padding increases a bit. I think a little animation on change would be a nice touch.

I had to disable animations because the words themselves were animating from regular to bold, and it looked really strange. I can mess with it again once we get to a polishing stage with the feature.