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)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Technical debt
• Tests

Checklist:

• Code changes
• Unit tests added
• Acceptance tests added
• Documentation added/updated

Open tasks:

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

[update-docs]

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]

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