Add Desktop support to Planned Features

assets/langs/en.yaml

@@ -229,6 +229,7 @@ feature:
   latex: Latex Support
   mermaid: Mermaid Diagram Support
   encryptedHosting: Encrypted Git Hosting
+  desktop: Desktop App
 
 feature_timeline:
   title: Feature Timeline

lib/features.dart

@@ -48,6 +48,7 @@ class Features {
     tr("feature.latex"),
     tr("feature.mermaid"),
     tr("feature.encryptedHosting"),
+    tr("feature.desktop"),
   ];
 }