Add new icon for PM2 config file

[kaualandi]

'processes.json' as a PM2 file. PM2 is a daemon process manager that will help you manage and keep your application online 24/7.

[JonatanLindstrom]

Don't know if you've noticed, but in your commit you linted the entire file to use double quotes instead of single quotes. Please update so your code follows the styling guidelines set in the Prettier config 😊 Will make it much easier to see what changes you made.

[ghost]

The icon doesn't really fit the Material Theme-y feel. I mean it looks pretty cool. Example in VSCode:

[ghost]

@JonatanLindstrom Correct. He linted it himself