feat: health check endpoint

[DanielRivers]

Explain your changes

This adds a health check, it output in json format the Kinde configuration.

This will assist in diagnosing issues especially when pushed to production around configuration

Secret checks the format, if detects a secret that parses the right format will show Set correctly, otherwise will show Not set correctly

Checklist

• [x] I have read the “Pull requests” section in the contributing guidelines.
• [x] I agree to the terms within the code of conduct.

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