[WCM] Skip console commands from event listeners

| Q             | A
| ------------- | ---
| Doc fix?      | no
| New docs?     | yes (symfony/symfony#9235)
| Applies to    | master
| Fixed tickets | none
The `113` number looks so odd and arbitrary, that I would add a comment about why that number was chosen. Something like this:

> The application will then return the code `113` (defined in ...), which is one of the codes reserved
> for the console commands to conform with the C/C++ standard.