[feature] Add `Django/Jinja template (Indenter & linter/formatter)` to `openwisp-qa-format`

[Aryamanz29]

It would be better to have a Django/Jinja template (indenter & linter/formatter) for openwisp-qa-format since many projects under OpenWISP use Django templates.

Some tools that we can look into:

• rtts/djhtml (a pure-Python Django/Jinja template indenter)
• Riverside-Healthcare/djlint (Django Template Linter and Formatter)