[Feature Request]: Report source FPS in filename about isubrip HOT 1 OPEN

Hey, thanks for the suggestion.
This should be possible, as the M3U8 playlist does seem to include FPS data for video streams, and I suppose it is useful for syncing purposes.
I'll have to look into it further and confirm the FPS from there doesn't raise any issues.

If I do implement it, it'll probably be printed metadata after running the command and scraping the data, instead of adding it in filenames.

I'm also currently finishing up a big refactor to most of the code (mostly backend-ish stuff), so it could take some time.

from isubrip.