Config schema definition

Problem/Motivation

This module defines configuration; however, does not define the configuration schema necessary to validate the configuration.

➜  🤖 Analyzing…
 Legend for Data: 
  ✅❓  → Correct primitive type, detailed validation impossible.
  ✅✅  → Correct primitive type, passed all validation constraints.
 -------------------------------------------------------------------------------------------------------- ---------------- ------------- ---------- 
  Key                                                                                                      Status           Validatable   Data
 -------------------------------------------------------------------------------------------------------- ---------------- ------------- ----------
  mollie.config                                                                                            No schema

Steps to reproduce

Use config_inspector (or some other config schema validation tool), and see that the configuration for this module is missing a schema.

Proposed resolution

Define the configuration schema.