How can I change the default archive methods on web frontend / CLI when I select nothing?

[WantToLearnJapanese]

Currently behavior: archive methods (select at least 1, otherwise all will be used by default)
Expected behavior: Configurable default options when I choose nothing.

I know: I can opt-out methods by set SAVE_* as False.
=> But: It just disables the functionality. If I SAVE_PDF=False, even I select pdf, Archivebox does nothing.

[WantToLearnJapanese]

• I propose to add the config option to set a list of defaults methods (which could be passed to the "extractors" argument of this function.

[pirate]

Can't promise I'll get around to adding this myself anytime soon, but I'd be down to review PRs to add a DEFAULT_EXTRACTORS option that takes a CSV of extractor names to enable by default.

It should modify the archivebox add, archivebox schedule, and /add/ interaces to use that set by default, but still allow overriding with --extract=somedisableddextractor,etc or by choosing in the UI list.

[pirate]

Related: #881