More filter options for shows and movies

[UweTrottmann]

• e.g. genre, network
• streaming service (would have to store and update all current ones in a searchable way)

SQLite instr may help with just adding a single column for this. Otherwise LIKE might work. Edit: Better use a mapping table. Also avoids modifying the shows table.

[UweTrottmann]

Filter shows by watch provider with #969