Tweak feed card to prevent spinnerz when pushing to screen

[haileyok]

Why

There's some spinner states on feed cards - in prod, not related to the FeedCard change necessarily - that we'd like to remove. Easy little win.

We also didn't actually migrate to using the new FeedCard in the ProfileFeedgens list. I had done this work in the starterpacks branch, so I picked it out of there and made a couple tweaks after the recent FeedCard merge into main.

Finally, made a little types tweak inside of FeedCard so that Link knows whether something is a ListView or GeneratorView, supporting this new precaching.

How

We already have a precacheFeed function that takes in FeedSourceInfo from inside one of our query functions. However, we also want to make it possible to run this with a GeneratorView.

Following a similar pattern that we use for posts and profiles, we're adding a precacheFeedFromGeneratorView that can be called with the Link's onPress. This runs just before pushing to the screen - and lets the query already have the info it needs.

Test Plan

Visit a profile that has some feeds, and notice the lack of a spinner state (easiest to see with throttling)

Before

Screen.Recording.2024-06-21.at.7.03.42.PM.mov

After

Screen.Recording.2024-06-21.at.7.04.49.PM.mov

[render]

Your Render PR Server URL is https://social-app-pr-4600.onrender.com.

Follow its progress at https://dashboard.render.com/web/srv-cpr31iss1f4s73b9fi70.

[github-actions]

Old size	New size	Diff
6.31 MB	6.31 MB	1.13 KB (0.02%)

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[gaearon]

lgtm