* Refactor first onboarding step
* Replace old FeedSourceCard
* Clean up CustomFeedEmbed
* Remove discover feeds model
* Refactor ProfileFeed screen
* Remove useCustomFeed
* Delete some unused models
* Rip out more prefs
* Factor out treeView from thread comp
* Improve last commit
* Add initial preferences query, couple mutations
* Remove unused
* Clean up labels, migrate getModerationOpts
* Add birth date handling
* Migrate feed prefs
* Migrate thread view prefs
* Migrate homeFeed to use existing key name
* Fix up saved feeds in response, no impl yet
* Migrate saved feeds to new hooks
* Clean up more of preferences
* Fix PreferencesThreads load state
* Fix modal dismissal
* Small spacing fix
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Co-authored-by: Paul Frazee <pfrazee@gmail.com>