Add line_after_use fixer

Replaces #816
Implements #153 


It has to be like this because:

The first is to catch this:
`use A; //comment` to increment the index to insert at, if there is a comment afterwards with whitespace in between.
The second will again increment, when there is a comment after the use statement, as this now evaluates to true now both for:
- `use A; //comment`
- `use A;//comment`