Data Protection Agreement

[tobias-wiese]

Description

• Adds a basic data protection agreement placeholder page that refers to the university.

Reason for this PR

Changes in this PR

• add a dpa page with a placeholder
• link the page on the about page

Type of change (remove all that don't apply)

• New feature (non-functional)

Checklist: (remove all that don't apply)

• I have performed a self-review of my own code
• My changes generate no new linting warnings or console warnings
• I have updated the CHANGELOG.md to include any changes made in this PR (add WIP to the top, if there is none already)

Notes

• This was a feature that was requested for this sprint, yet will have to be refactored slightly on the design branch. But that should be work for more than 5 minutes.