Merge eclipse.org-research with eclipse.org

The eclipse.org-research website in hugo was done before we migrated eclipse.org to hugo.

Now that are live with eclipse.org hugo, I would like to recommend that we merge both projects for the following reason:

1. Maintenance: Easier for us to maintain 1 project versus 2
2. SEO: Since the eclipse.org hugo website is at the root of eclipse.org, that site serves a sitemap.xml that googles uses to index our website. If we migrate eclipse.org-research with eclipse.org, all the pages from our research website will be included in our sitemap: https://www.eclipse.org/sitemap.xml

Note that only the page migrated to hugo appears in that sitemap so far. This will grow overtime.

@pkriefrvi Do you have any concerns with doing this? Let me know if you have questions, I am more than happy to jump on a call with you to discuss this furter.