feature request: Add alldebrid support

[codefreak558]

Checklist

• [x] I checked that this feature has not been requested before
• [x] I checked that this feature is not in the "Not planned" list
• [x] This feature will benefit the majority of users

Problem Description / Use Case

Currently the only two debrid services are:

• Torbox
• Real-Debrid

I do still use Torbox but I have switched over to Alldebrid on my Stremio instance as alldebrid is quicker and has a cache of similar size to Real-Debrid.

Proposed Solution

Add Alldebrid support.

They do have api documentation available at: docs.alldebrid.com

[MiguVT]

bump, hope someone make a PR for that

[DonAppetito]

I would also love to see AD supported in seanime.

[MiguVT]

I moved to RD and its better in my opinion, but its soo important to have this option too, an alternative is always welcome. (I moved to RD but stills having AD, I will love have both in seanime)