[APP-786] Native notifications (#1095)

* move `notifee.ts` to notifications folder

* install expo notifications

* add UIBackgroundMode `remote-notifications` to app.json

* fix notifee import in Debug.tsx

* add `google-services.json`

* add `development-device` class to eas.json

* Add `notifications.ts` for native notification handling

* send push token to server

* update `@atproto/api`

* fix putting notif token to server

* fix how push token is uploaded

* fix lint

* enable debug appview proxy header on all platforms

* setup `notifications.ts` to work with app view notifs

* clean up notification handler

* add comments

* update packages to correct versions

* remove notifee

* clean up code a lil

* rename push token endpoint

* remove unnecessary comments

* fix comments

* Remove old background scheduler

* Fixes to push notifications API use

* Bump @atproto/api@0.6.6

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Co-authored-by: Paul Frazee <pfrazee@gmail.com>

src/platform/detection.ts

@@ -5,6 +5,7 @@ import {dedupArray} from 'lib/functions'
 export const isIOS = Platform.OS === 'ios'
 export const isAndroid = Platform.OS === 'android'
 export const isNative = isIOS || isAndroid
+export const devicePlatform = isIOS ? 'ios' : isAndroid ? 'android' : 'web'
 export const isWeb = !isNative
 export const isMobileWebMediaQuery = 'only screen and (max-width: 1230px)'
 export const isMobileWeb =