Move to expo and react-navigation (#288)

* WIP - adding expo

* WIP - adding expo 2

* Fix tsc

* Finish adding expo

* Disable the 'require cycle' warning

* Tweak plist

* Modify some dependency versions to make expo happy

* Fix icon fill

* Get Web compiling for expo

* 1.7

* Switch to react-navigation in expo2 (#287)

* WIP Switch to react-navigation

* WIP Switch to react-navigation 2

* WIP Switch to react-navigation 3

* Convert all screens to react navigation

* Update BottomBar for react navigation

* Update mobile menu to be react-native drawer

* Fixes to drawer and bottombar

* Factor out some helpers

* Replace the navigation model with react-navigation

* Restructure the shell folder and fix the header positioning

* Restore the error boundary

* Fix tsc

* Implement not-found page

* Remove react-native-gesture-handler (no longer used)

* Handle notifee card presses

* Handle all navigations from the state layer

* Fix drawer behaviors

* Fix two linking issues

* Switch to our react-native-progress fork to fix an svg rendering issue

* Get Web working with react-navigation

* Refactor routes and navigation for a bit more clarity

* Remove dead code

* Rework Web shell to left/right nav to make this easier

* Fix ViewHeader for desktop web

* Hide profileheader back btn on desktop web

* Move the compose button to the left nav

* Implement reply prompt in threads for desktop web

* Composer refactors

* Factor out all platform-specific text input behaviors from the composer

* Small fix

* Update the web build to use tiptap for the composer

* Tune up the mention autocomplete dropdown

* Simplify the default avatar and banner

* Fixes to link cards in web composer

* Fix dropdowns on web

* Tweak load latest on desktop

* Add web beta message and feedback link

* Fix up links in desktop web

src/lib/hooks/usePermissions.ts

@@ -0,0 +1,50 @@
+import {Alert} from 'react-native'
+import {Camera} from 'expo-camera'
+import * as MediaLibrary from 'expo-media-library'
+import {Linking} from 'react-native'
+
+const openSettings = () => {
+  Linking.openURL('app-settings:')
+}
+
+const openPermissionAlert = (perm: string) => {
+  Alert.alert(
+    'Permission needed',
+    `Bluesky does not have permission to access your ${perm}.`,
+    [
+      {
+        text: 'Cancel',
+        style: 'cancel',
+      },
+      {text: 'Open Settings', onPress: () => openSettings()},
+    ],
+  )
+}
+
+export function usePhotoLibraryPermission() {
+  const [mediaLibraryPermissions] = MediaLibrary.usePermissions()
+  const requestPhotoAccessIfNeeded = async () => {
+    if (mediaLibraryPermissions?.status === 'granted') {
+      return true
+    } else {
+      openPermissionAlert('photo library')
+      return false
+    }
+  }
+  return {requestPhotoAccessIfNeeded}
+}
+
+export function useCameraPermission() {
+  const [cameraPermissionStatus] = Camera.useCameraPermissions()
+
+  const requestCameraAccessIfNeeded = async () => {
+    if (cameraPermissionStatus?.granted) {
+      return true
+    } else {
+      openPermissionAlert('camera')
+      return false
+    }
+  }
+
+  return {requestCameraAccessIfNeeded}
+}