Provide white glove service if config is missing

[alexanderilyin]

On the first use, if no API key is found, the user should be prompted for the API key and the result should be saved in the container user home folder.

TODO

• Integrate status of credential configuration with https://starship.rs/
  • Show if credentials are set and the source of credentials being used.

[alexanderilyin]

• Not sure if I actually can ask for user input from pre-commit managed hook but need to check.
• Maybe it's possible during pre-commit install
• Last resort in managed container is to have something installed in ~/.bashrc which will "validate" installed features and prompt for tokens if necessary.

[alexanderilyin]

Here is current UX if variable has 1Password placeholder

OPENROUTER_API_KEY=op://.../.../...

PartCAD: Prepare Commit Message..........................................Failed
- hook id: prepare-commit-msg
- exit code: 1

removed '/tmp/tmp.AlndLPXVXk'
removed '/tmp/tmp.cE4azxHFsn'
removed '/tmp/tmp.VXsyFvRHmj'
ERROR: API request failed: Invalid credentials

And here is the UX for loading actual credentials:

⬢ [Docker] ❯ source env.sh 
Using configuration at non-standard location "/workspaces/partcad/.op"
Enter the password for alexander@ilyin.eu at my.1password.com: 
Using configuration at non-standard location "/workspaces/partcad/.op"