Add CLI config lint command

[DevStrikerTech]

Implement a lightweight command that validates all config files under config/ and returns actionable error hints.

[Jaideep726]

Hi @DevStrikerTech! I'd love to grab this issue if it's still open. I'm thinking of writing a lightweight script that reads the config/ folder and spits out clear hints for any validation errors. Just let me know if you prefer a specific library for the CLI part, otherwise I'll get started!