Merge with django-bootstrap-v5

[nerdoc]

As there are 2 almost identical projects, both forked from django-bootstrap4, this only confuses users which is the "official" project.

I would strongly suggest you have a talk with @zelenij and merge these 2 projects (preferrably into zostera's django-bootstrap5).

[maltoze]

the current repo seems have many unimplemented options. such as field_class addon_before_class addon_after_class