Optional "opt-in" approach for enabling/disabling beautification languages

[s2t2]

Description

From the Settings, I would like the ability to take an "opt-in" approach to enabling and disabling beautifying languages, instead of an "opt-out" approach.

Current Behavior

Enable all by default, then disable individual languages ("opt-out").

Desired behavior

Disable all by default, then enable individual languages ("opt-in").

[ghost]

Please follow the issue template provided. More specifically, update the original comment for this issue by adding a link to the required debug.md gist which includes debugging information that answers our most commonly asked questions. Thank you.

[Glavin001]

Opt-in per language is actually how Unibeautify works: https://unibeautify.com/docs/config-file
I recommend you subscribe to #1174 .

This would be a major breaking change and not something we could support in Atom-Beautify before the Unibeautify release. I do expect many breaking changes in the Unibeautify release, so this kind of change would be more appropriate to build into Unibeautify. Fortunately, it already is 😄 .