Factor our feed source model (#1887)

* 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

src/state/queries/like.ts

@@ -0,0 +1,24 @@
+import {useMutation} from '@tanstack/react-query'
+
+import {useSession} from '#/state/session'
+
+export function useLikeMutation() {
+  const {agent} = useSession()
+
+  return useMutation({
+    mutationFn: async ({uri, cid}: {uri: string; cid: string}) => {
+      const res = await agent.like(uri, cid)
+      return {uri: res.uri}
+    },
+  })
+}
+
+export function useUnlikeMutation() {
+  const {agent} = useSession()
+
+  return useMutation({
+    mutationFn: async ({uri}: {uri: string}) => {
+      await agent.deleteLike(uri)
+    },
+  })
+}