Feature request: split credentials into variables and credentials

I think it could be beneficial to have separate sections for variables and credentials. Credentials should be write-only: you can set and reset the value in the UI, but not display it. A variable is visible also in the UI. Similarly to how GitHub splits Action settings into Secrets and Variables.

It feels quite uneasy having the credentials in plain sight in the UI. At least if they could be starred out and only visible on hover or click.