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.
Adds the following prebuilt presets:
```
"Single"
"SoundCloud Discography"
"YouTube Releases"
"YouTube Full Albums"
"Bandcamp"
```
which require no config.yaml to use. Usage examples can be found in the `/examples` directory
The only required field in a config was `working_directory`. This is now optional (defaults to `.ytdl-sub-working-directory`) making it so a config is no longer required. This sets the stage to onboard noob users who will solely use prebuilt presets in a single subscription file
* begin
* chapters class, trying to add chapter splitting and general ffmpeg metadata creation
* working split video
* so very close
* test passing, is reproducible
* lint fixed
* fix docs
* track no longer used in example
* if, then del
* multiple values
* github hash
* youtube video url
* WIP, channel /user/ and /c/ should be valid
* unit tests passing
* soundcloud artist url
* soundcloud username
* break configs with name change
* Update all yamls with urls
* update all docs
* more negative url tests
