Add new news and events templates for reuse across web properties

As websites move to using our new template: https://docs.google.com/presentation/d/1p3hJWdrT0U8IpHdOzDgdUjsS0gVxdl-YViE6Ht4XVAA/edit#slide=id.g2ca4097a1dd_2_9 we should consider adding the news and events templates to this project to allow us to reuse it across our sites.

It is currently being used in 2 places:

• https://orcwg.org
• https://dataspace.eclipse.org