feat(desktop): implement native desktop notifications for task completion and errors (#1293)

ui/flutter/pubspec.lock

@@ -265,6 +265,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "2.3.6"
+  dbus:
+    dependency: transitive
+    description:
+      name: dbus
+      sha256: d0c98dcd4f5169878b6cf8f6e0a52403a9dff371a3e2f019697accbf6f44a270
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.7.12"
   desktop_drop:
     dependency: "direct main"
     description:
@@ -406,6 +414,38 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "2.0.3"
+  flutter_local_notifications:
+    dependency: "direct main"
+    description:
+      name: flutter_local_notifications
+      sha256: "2b50e938a275e1ad77352d6a25e25770f4130baa61eaf02de7a9a884680954ad"
+      url: "https://pub.dev"
+    source: hosted
+    version: "20.1.0"
+  flutter_local_notifications_linux:
+    dependency: transitive
+    description:
+      name: flutter_local_notifications_linux
+      sha256: dce0116868cedd2cdf768af0365fc37ff1cbef7c02c4f51d0587482e625868d0
+      url: "https://pub.dev"
+    source: hosted
+    version: "7.0.0"
+  flutter_local_notifications_platform_interface:
+    dependency: transitive
+    description:
+      name: flutter_local_notifications_platform_interface
+      sha256: "23de31678a48c084169d7ae95866df9de5c9d2a44be3e5915a2ff067aeeba899"
+      url: "https://pub.dev"
+    source: hosted
+    version: "10.0.0"
+  flutter_local_notifications_windows:
+    dependency: transitive
+    description:
+      name: flutter_local_notifications_windows
+      sha256: e97a1a3016512437d9c0b12fae7d1491c3c7b9aa7f03a69b974308840656b02a
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.0.1"
   flutter_localizations:
     dependency: "direct main"
     description: flutter
@@ -1212,6 +1252,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "0.7.7"
+  timezone:
+    dependency: transitive
+    description:
+      name: timezone
+      sha256: dd14a3b83cfd7cb19e7888f1cbc20f258b8d71b54c06f79ac585f14093a287d1
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.10.1"
   timing:
     dependency: transitive
     description: