Renamed @eslegant/config to @eslegant/js, reflecting the new structure and
purpose of it just having rules related to javascript and
typescript
Moved said package to the new ./configs/ directory. Packages under the
./packages/ directory will be related to ones that aren't related to
ESLint itself and/or its configuration.
Removed the configs array from the cli package, as it now is handled by
the eslegant package.
Exported the Cli class so it can be run by other packages
BREAKING CHANGE
