Search custom feeds (#1031)

* paginate custom feeds

* basic search

* update `@atproto/api`

* use search from the API

* debounce search for 200ms

package.json

@@ -24,7 +24,7 @@
     "e2e:run": "detox test --configuration ios.sim.debug --take-screenshots all"
   },
   "dependencies": {
-    "@atproto/api": "^0.4.2",
+    "@atproto/api": "^0.4.3",
     "@bam.tech/react-native-image-resizer": "^3.0.4",
     "@braintree/sanitize-url": "^6.0.2",
     "@expo/html-elements": "^0.4.2",