docs: add eval frontpage callout - #706

Changed pages include:

• index.html - view
• 404.html - view
• blog/index.html - view
• configuration/index.html - view
• eval/index.html - view
• getting-started/index.html - view
• guide/index.html - view
• installation/index.html - view
• markdown-page/index.html - view
• resources/index.html - view

There are more changes not included in the list