Add ability to describe commit types

[balazsorban44]

This is a non-breaking change, fully optional, and works alongside existing configs. (Eg.: You can mix and match strings and object of form {type: string, description: string})

Example in .vscode/settings.json:

{ 
  "gitSemanticCommit.types": [
    {"type": "feat", "description": "A new feature"}
  ]
}

[nitayneeman]

Actually I planned to implement something by myself, but I haven't reached that.

Thank you for your contribution, it looks great! 🙂

[balazsorban44]

Thanks. Now my question is, how long does it take until it is published at https://marketplace.visualstudio.com/items?itemName=nitayneeman.git-semantic-commit
? Is it a manual process, or can this be done automatically from the master branch on Travis?