[Feature Request]: default tabulation to 4 spaces, customizable via variable

### What would you like to happen?

Hello guys,
it would be nice to have the option to set the default tabulation to 4 spaces, and to make it customizable via a variable.

What do you think? :)

### Issue Priority

Priority: 3

### Issue Component

Component: Transforms

No file, test, or entry point is named. Start by locating how Transforms currently choose tabulation width and how configurable variables are defined; done means four spaces are the default and the width can be overridden by a variable.

Written by the indexing model from the issue text.