New onboarding (#241)

* delete old onboarding files and code

* add custom FollowButton component to Post, FeedItem, & ProfileCard

* move building suggested feed into helper lib

* show suggested posts/feed if follower list is empty

* Update tsconfig.json

* add pagination to getting new onboarding

* remove unnecessary console log

* fix naming, add better null check for combinedCursor

* In locally-combined feeds, correctly produce an undefined cursor when out of data

* Minor refactors of the suggested posts lib functions

* Show 'follow button' style of post meta in certain conditions only

* Only show follow btn in posts on the main feed and the discovery feed

* Add a welcome notice to the home feed

* Tune the timing of when the welcome banner shows or hides

* Make the follow button an observer (closes #244)

* Update postmeta to keep the follow btn after press until next render

* A couple of fixes that ensure consistent welcome screen

* Fix lint

* Rework the welcome banner

* Fix cache invalidation of follows model on user switch

* Show welcome banner while loading

* Update the home onboarding feed to get top posts from hardcode recommends

* Drop unused helper function

* Update happy path tests

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Co-authored-by: Paul Frazee <pfrazee@gmail.com>

src/view/com/post/Post.tsx

@@ -156,6 +156,8 @@ export const Post = observer(function Post({
             authorHandle={item.post.author.handle}
             authorDisplayName={item.post.author.displayName}
             timestamp={item.post.indexedAt}
+            did={item.post.author.did}
+            declarationCid={item.post.author.declaration.cid}
           />
           {replyAuthorDid !== '' && (
             <View style={[s.flexRow, s.mb2, s.alignCenter]}>