Add strawberry django auth implementation to doc

[Skyquek]

Add Strawberry DJango Auth tutorials in the doc

Description

Its would be helpful to add the tutorial for Django Auth implementation to /guide/authentication.

Its would be beneficial to newcomers to integrate strawberry django auth to the django strawberry application. Especially on the:

1. Authorization
   • manage permission / authorization
   • determine if the user have priviledge to access certain resources
2. Authentication
   • determine if the user is login
   • determine

Upvote & Fund

• We're using Polar.sh so you can upvote and help fund this issue.
• We receive the funding once the issue is completed & confirmed by you.
• Thank you in advance for helping prioritize & fund our backlog.

[thclark]

I'm not sure why you would document a different library here, although a link to that project from the docs would be nice.