v0.0.2 - Getting in shape

Mostly fixes, based on nimona v0.6.0

Changelog

• Remove dark mode until the UI is stable
• Add message grouping and timestamps
• Fix broken dialogs on macOS
• Add notifications on macOS
• Moved add/join conversation from a dialog into the right panel
• Fix message box getting cleared when receiving a new message
• Fix message ordering
• Fix message box losing focus