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.
Now each config is related to a specific language and or purpose,
having different "flavors" or levels of strictness for them
Presets now have the purpose of simply grouping said configs for easier
of them.
BREAKING CHANGE
Rewrote the configuration and logic of the defineConfig function
to better resemble a standard ESLint configuration.
Also removing the necessity of a function to detect tsconfig/jsconfig
files.
Fixing ESLint flat-config by default #3.
Created/configured the basic rules, extending eslint and
typescript-eslint recommended rules. Currently these rules are mostly
mimicking [antfu's config](https://github.com/antfu/eslint-config)
