Add legally required/advised-to-have files to the root of the site * Requested for the IP review for Graphiti 0.18.0 and Eclipse 2021-06 Bug: https://gitlab.eclipse.org/eclipsefdn/emo-team/emo/-/issues/45 Change-Id: I7a9ab929d4eca792d8299c586fca99e7ce86ce05