Webpage (schueltke): added imprint and private policy

Description

• added imprint RWTH
• added private policy RWTH

Related Issue(s)

• Closes #20

Other Changes

• corrected links to imprint and private policy
• changed German to English

Screenshots/Logs

N.A

Testing Instructions

1. Download this branch
2. Open test server
3. Check Footer Links to Imprint and Private Policy

Developer Checklist

• Code has been tested locally and/or in pipeline.
• Merge conflicts resolved with the target branch.

Additional Notes

N.A