feature request: browser integration to make interactive authentication more smooth

[jku]

Currently interactive auth results in this:

$ sign_blob README.md -o README.md.sigstore.json
Signing artifact: README.md
  Size: 7571 bytes
  Starting interactive authentication...

Please visit: https://oauth2.sigstore.dev/auth/device
Or open: https://oauth2.sigstore.dev/auth/device?user_code=ABCD-EFGH

Enter code: ABCD-EFGH

Waiting for authentication...

Would be nice to do a couple of things to smooth this experience:

• the local-redirect-server trick so we don't need to show the user the device code at all -- see sigstore-python or cosign for examples
• try to open a browser automatically. If browser open does not work, then print the URL

[wolfv]

I would love that. Let me know if you are working on this, otherwise I can give it a go, too.

[jku]

I am not working on this right now, feel free: I'll leave a comment if I make an attempt in future

[wolfv]

I think this should be better than before now :)