Add negative margins

[hurradieweltgehtunter]

Description

Add css classes for negative margin

Related Issue

N/A

Motivation and Context

Negative margins are kinda standard in other css frameworks.

Types of changes

• [ ] Bug fix (non-breaking change which fixes an issue)
• [x] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)
• [ ] Technical debt
• [ ] Tests

Checklist:

• [x] Code changes
• [ ] Unit tests added
• [ ] Acceptance tests added
• [x] Documentation added/updated

Open tasks:

• [ ] tests?
• [ ] Documentation done in project .md file. Needed elsewhere, too?

[update-docs[bot]]

Thanks for opening this pull request! The maintainers of this repository would appreciate it if you would create a changelog item based on your changes.

[CLAassistant]

All committers have signed the CLA.