Push Notifications (#66)

Fixes #35.

Things to do:
- [x] Register with local distributor
- [x] Register with homeserver
- [x] Recieve messages
- [x] Show notifications
- [ ] Notifications page (could come later)

Reviewed-on: #66

macos/Flutter/GeneratedPluginRegistrant.swift

@@ -8,6 +8,7 @@ import Foundation
 import app_links
 import dynamic_color
 import file_selector_macos
+import flutter_local_notifications
 import media_kit_libs_macos_video
 import media_kit_video
 import package_info_plus
@@ -15,12 +16,14 @@ import screen_retriever_macos
 import shared_preferences_foundation
 import url_launcher_macos
 import wakelock_plus
+import webcrypto
 import window_manager
 
 func RegisterGeneratedPlugins(registry: FlutterPluginRegistry) {
   AppLinksMacosPlugin.register(with: registry.registrar(forPlugin: "AppLinksMacosPlugin"))
   DynamicColorPlugin.register(with: registry.registrar(forPlugin: "DynamicColorPlugin"))
   FileSelectorPlugin.register(with: registry.registrar(forPlugin: "FileSelectorPlugin"))
+  FlutterLocalNotificationsPlugin.register(with: registry.registrar(forPlugin: "FlutterLocalNotificationsPlugin"))
   MediaKitLibsMacosVideoPlugin.register(with: registry.registrar(forPlugin: "MediaKitLibsMacosVideoPlugin"))
   MediaKitVideoPlugin.register(with: registry.registrar(forPlugin: "MediaKitVideoPlugin"))
   FPPPackageInfoPlusPlugin.register(with: registry.registrar(forPlugin: "FPPPackageInfoPlusPlugin"))
@@ -28,5 +31,6 @@ func RegisterGeneratedPlugins(registry: FlutterPluginRegistry) {
   SharedPreferencesPlugin.register(with: registry.registrar(forPlugin: "SharedPreferencesPlugin"))
   UrlLauncherPlugin.register(with: registry.registrar(forPlugin: "UrlLauncherPlugin"))
   WakelockPlusMacosPlugin.register(with: registry.registrar(forPlugin: "WakelockPlusMacosPlugin"))
+  WebcryptoPlugin.register(with: registry.registrar(forPlugin: "WebcryptoPlugin"))
   WindowManagerPlugin.register(with: registry.registrar(forPlugin: "WindowManagerPlugin"))
 }