Bookmarks are added through search results and can be accessed through
the library. These can be moved and deleted within the list.
Add a RealDebrid instant availability cache for bookmark IA status
to not overwhelm the API. Instant availability results are fresh on
every search results since the cache is cleared.
Also don't require a source API object to be present for the API parser
button in source settings. If a JSON parser exists for a source, allow
the option to be presented.
Signed-off-by: kingbri <bdashore3@proton.me>