Implement new blog and videos pages

As part of the Eclipse.org new website design, we would like to add a new blog page:

Here is the XD link: https://xd.adobe.com/view/ab0445f6-bfc6-4e4a-89c5-45669dce7bfe-fe57/

Here are the assets: placeholder_images.zip

Note: These assets are placeholders and will be changed based on the content/author.

Thanks,

CC: @sgiacomoni2as