Allow for arbitrary episode numbering

[enigma0Z]

Episodes currently are constrained to the range of the starting episode number + number of titles on the disc. Show distributions don't always follow this schema (skipping episodes, etc.). Rewrite SortInfo and supporting code with a new data model which supports arbitrary episode/season information:

1. New UI which provides the existing features with a button & pre-fill option
2. New data model supporting the proposed changes
3. New UI which allows the user to change the defined season & episode numbers per track
4. Allow for multiple episode numbers per track (animation is NOTORIOUS for doing this)
5. Add sort api endpoint which will validate the given SortInfo from the UI
6. Only proceed with a rip if the given sort info is valid

Validity constraints for sort info:

• Each main title is listed once in sort info
• Each main title has a unique combination of season number and episode number(s)