Description of change

Added a docs folder that we can use to store our documentation 'source' files. For now it only contains a quick-start.md file but in the future more documentation files will be added here.

Links to any relevant issues

See the corresponding /docs PR: https://github.com/impierce/docs/pull/6
and the actual documentation preview: https://docs-git-test-quick-start-impierce.vercel.app/unicore/introduction/quick-start

How the change has been tested

n/a

Definition of Done checklist

Add an x to the boxes that are relevant to your changes.

• I have followed the contribution guidelines for this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• I have successfully tested this change in a docker environment