Build new settings window in desktop app

[richiemcilroy]

Build a Settings window in the desktop app. Take inspiration from Spacedrive layout as seen in screenshot below (inspiration, not exact design). Also maybe use shadcn (we already use some of these components in packages/ui. Their forms example here looks interesting.

Requirements

• [ ] Settings cog icon in main app view (next to home button)
• [ ] On click, open new larger settings window
• [ ] Sidebar with clickable tabs. Just two for now. "About" and "Settings". "About" page can just contain current app version for now. You can leave "Settings" page blank.
• [ ] Should be easy to add new tabs
• [ ] Close button in corner, showing the main app again