add basic music stats data fetching code
add music stats generator function, optimize some stats related functions
add container for music graphs, refactor code for displaying library type stats with headers
add first music chart
add music genre and added over time charts. remove unused duration data
add music bitrate chart
add 4k movie resolution mapping to graphs, fix bug with showing empty music charts
remove null music bitrate values from stats
actually fix music section showing up when empty
fix charts showing up squashed