Add README with project and update schedule details

Author: netomi

README.md

@@ -0,0 +1,8 @@
+## Eclipse Projects
+
+This repository maintains a GitHub pages site to display all Eclipse Foundation projects
+hosted on GitHub with the respective links to their project page and GitHub organization to easily discover them.
+
+### Update schedule
+
+A workflow is triggered every 6h to fetch the latest PMI data from [projects.eclipse.org](https://projects.eclipse.org) and builds a GH Pages site.