Allow usage prior to complete library load
Requirements:
- When the application initially opens, load the first 100 artists in the tree view
- Start the full library load in in the background.
- Provide implementations of item lookup/child lookup/search that work by calling the appropriate jellyfin server APIs
- Until the library load is complete, use these remote APIs to perform the actions to not block the user behind the full load in.
- Once the library load is complete, these actions should use their in memory version.