Docs on how to design your own package

[samdark]

Proposed new feature or change

Need docs on designing your own package that provides configs to Yii app.

1. Config groups
2. Adding routes
3. DI service providers
4. Regular config and params
5. Assets
6. Events
7. Migrations
8. Translations
9. Themes
10. Console commands

Describing it like https://laravel.com/docs/12.x/packages would be alright.