Redirect unsupported paths to TMDB or OMDB.

[MintMain21]

Until there is official support for paths such as search or cast/crew, it may be handy to redirect to one of those IMDB alternatives instead of loading a error page.

[zyachel]

I could at best redirect to search results for the given title name. since TMDB has different slug for titles than what IMDb has.

[MintMain21]

I think with all the updates to Libremdb, this is irrelevant.