[CLI] Improve logging of script arguments validation errors

[LoicPoullain]

Issue

When running a shell script with invalid arguments, Foal does not display all the errors.

For example, with this schema and this command call, we only get the following log message:

export const schema = {
  type: 'object', 
  properties: {
    email: { type: 'string', format: 'email', maxLength: 2 },
    password: { type: 'string' },
    n: { type: 'number', maximum: 10 }
  },
  required: ['password']
};

foal run my-script email=bar n=11

Error: The command line arguments must match format "email".

Solution and steps

• [x] Improve the CLI so as to display all the errors (with a better description)

Script error: arguments must have required property 'password'.
Script error: the value of "email" must NOT have more than 2 characters.
Script error: the value of "email" must match format "email".
Script error: the value of "n" must be <= 10.

Checklist

• [x] Add/update/check docs (code comments and docs/ folder).
• [x] Add/update/check tests.
• [x] Update/check the cli generators.