feat(library): rework library to load into database for improved speed

[hellcat707hp]

Goal

Move the library info into a database when its loaded for the first time instead of reloading from storage each time,

This will improve app speed and follows the standard for most audio players.

Task Breakdown

• Use a local database to store a list of files/folders/stations when the folder is selected for the first time.
• Each time the app loads, fire off a refresh of the database as a background process so as to not impact the app responsiveness.
• Add an action in settings to manually trigger a refresh of the database.
• Replace existing direct loading code with database access instead.
• Proper error handling for if we access a file that has moved since we last refreshed the database.