Homepage content + MVDS content on IDS Testbed repo

[anilturkmayali]

We need to check the viability of some information on this repository:
Can we please review the content and -if needed- remove the deprecated content?

https://github.com/International-Data-Spaces-Association/IDS-testbed/blob/master/minimum-viable-data-space/MVDS.md

https://github.com/International-Data-Spaces-Association/IDS-testbed/

Thank you