Adds a Windows-specific uninstaller under windows/uninstaller/ that:
- Shows a Yes/No confirmation dialog via Windows Forms
- Displays a live progress window (no console) during removal
- Removes app files, Start Menu/Desktop/Startup shortcuts,
AppData configuration, and all registry entries
- Mirrors paths/keys from the Inno Setup installer (inno_setup.iss)
- Includes a Register-SpotubeUninstaller.ps1 helper to surface the
uninstaller in Control Panel -> Programs and Features
- Provides a .bat wrapper (WindowStyle Hidden) so only GUI dialogs show
Closes: N/A
