Enhancement: Better validation for custom provider YAML files

[s-sajid-ali]

What features would you like to see added?

Better validation for custom providers to prevent issues like having apikey instead of apiKey cause silent failures instead of informative error messages.

Reference: LibreChat-AI/librechat.ai#167

More details

Prevent silent failures like the one I came across for

LibreChat/api/server/services/Config/loadConfigModels.js

Line 68 in 493e64e

const API_KEY = extractEnvVariable(apiKey);

from creating confusion for users.

Which components are impacted by your request?

No response

Pictures

No response

Code of Conduct

• I agree to follow this project's Code of Conduct

[0xStuart]

If we had an endpoint plugin system, we could have a marketplace, where vendors and the community can provide endpoints.
#4617