With the right functions, it was possible for subscription validation to raise a false-positive error. This should hopefully resolve that issue and give validation a small performance increase
Adds generic `filter_include` and `filter_exclude` plugins in anticipation for function script usage. Will detail it more with official docs at a later time!
A complete gutting of the internals of ytdl-sub to support functions in our variable syntax, in addition to being able to access a yt-dlp entry's .info.json fields using functions. Functionally, ytdl-sub should still look and behave the same from a user-perspective.
With so many lines of code changed (+8927, -2708), no doubt there will be new issues. Please make a GH issue or reach out on Discord if your config/subscriptions break in any way/shape/form.
Details on how to use function support will come soon in the form of proper documentation in our readthedocs.
* [BACKEND] Support empty urls for multi_url, add overrides for extra urls in tv_show_by_date preset
* need to check for missing urls in downloader
* use override in test
* docs about multi url
* wording
