Add spec page for package contents - #393

Changed pages include:

• index.html - view
• 404.html - view
• blog/index.html - view
• community/index.html - view
• learn/index.html - view
• style-guide/index.html - view
• blog/2022-03-30-conda-survey/index.html - view
• blog/2022-04-27-welcome-to-conda-dot-org/index.html - view
• blog/2022-08-24-conda-releases/index.html - view
• blog/2022-09-27-conda-release-22-9-0/index.html - view

There are more changes not included in the list