Listening metrics/charts

[boldandbrad]

Describe the problem
Users want to see their listening stats and trends over time in a convenient CLI format.

Describe the solution you'd like
Add a spin stats command with subcommands:

• spin stats top - Top artists/albums/tracks
• spin stats weekly - Listening summary by week
• spin stats monthly - Listening summary by month
• spin stats range - Custom date range

Example:

spin stats top --period month --limit 10
"Top tracks this month:"
  1. Paranoid Android - Radiohead (42 plays)
  2. Comfortably Numb - Pink Floyd (38 plays)

Describe alternatives you've considered
Users can view stats on last.fm's website, but this requires leaving the terminal.

Additional context/considerations

• Fetch data from last.fm's user.getWeekly*Chart methods
• Could cache results to reduce API calls
• May want to store local stats for offline access
• Consider using bubbletea components for visualizations and charts