Have a separate introduction page for Yii 3 with all links

[arogachev]

Need to create a list with what exactly needs to be included first.

[samdark]

1. Guide.
2. API docs.
3. Progress page.
4. Communities.
5. Contributing to Yii.

[viktorprogger]

Example of a such page: https://laravel.com.

It has all you may need with Laravel on the first screen of the main page.