Support for named teams

[jooaodanieel]

It would be nice to use pre-defined named teams that translate to a set of people.

For exemple, with this gcommit.conf.json

{
  "team": [
    {
      "name": "Alfred Billard",
      "email": "[email protected]",
      "tag": "AB"
    },
    {
      "name": "Chad Delligan",
      "email": "[email protected]",
      "tag": "CD"
    }
  ],
  "format": "GCommit/GitHub",
+ "namedTeams": {
+   "frontend": [ "AB", "CD" ]
+ }
}

when running the following

git gcommit frontend

would work as

git gcommit AB CD

generating

Co-authored-by: Alfred Billard <[email protected]>
Co-authored-by: Chad Delligan <[email protected]>

note: don't forget to update README accodingly 🚀

[doriancodes]

I would like to work on this issue