Add enabled parameter in configuration

[Arkalo2]

This feature aims to separate the enabling of handlers based on the environment.

Use Case :

You have 3 servers on your project : dev, staging, and prod

• On your dev machine, you are in the dev environment.
• On your staging server, you are in the prod environment.
• On your prod server, you are in the prod environment.

Currently, you can't disable handlers for a specific environment. For an instance, you can't disable logging only in your staging environment.

With the enabled parameter, you are able to disable logging only in the staging environment.