Validate webflow-aws-config.yaml configuration

[fedecastelli]

Is your feature request related to a problem?
No.

Describe the solution you'd like
The configuration file is created thanks to the webflow-aws create-config command but the file can be updated manually by the user. Create a function to validate the configuration parameters.

[70nyIT]

Function validate_config(config: dict) should return a dictionary so structured

{
  "valid": true / false,
  "missing_params": [],  // list of missing params
}