New funtionalities on Screen Rule

### Description of the new feature / enhancement

Would be very useful to have these features:
- add more vertical & horizontal rules
- lock, unlock rules

### Scenario when this would be used?

Check alignment content on the browser, measure boxes, line height, columns, etc

### Supporting information

It's a feature available on https://pixelsnap.com/it

Start by locating the Screen Rule implementation in PowerToys and review how its current rules are rendered and controlled. Clarify the expected number and orientation of additional rules and the lock/unlock behavior; done means alignment and measurement workflows support those rules as described.

Written by the indexing model from the issue text.