Feature Request: Add Bluesky as additional identity

Having the ability to prove an identity on the Bluesky social platform would be beneficial as many technical individuals are on the site and would benefit from having some additional identity verification:

https://bsky.app

If there is anything that I can do to help please do not hesitate to point me in the right direction and I'll give it my best shot.

Start by reviewing the issue request and the linked Bluesky site to understand the proposed identity-verification flow. No repository files, tests, or entry points are named; the work is complete when Bluesky identity proof is supported end to end and its verification behavior is covered by the project’s relevant checks.

Written by the indexing model from the issue text.