Add Subtitulamos provider integration

[Nyaran]

Added Subtitulamos provider

This PR is partially based and replaces #826 (skipping the provider "tusubtitulo" as is not working anymore)

Also I added a way to run the cli from source code (subliminal/cli.py#L727-L728) , as is helpful to debug new additions (if you don't like it, tell me and I'll remove it)

Pending:

• [x] Add tests
• [x] Changelog entry
• [x] CI passes (except docs)

[getzze]

Thanks for updating this provider!

Don't worry too much about mypy (or if you need help let me know). It's better if coverage is high ;)

[getzze]

Great job!