Migrate Sharding Documentation to Manual from Wiki

This is a tracking ticket to migrate content from the wiki to the manual. This process entails:

• Reviewing existing (wiki) documentation.
• Ensuring that that all information documentation exists in the new documentation.
• Determining where the redirection should point in the new documentation.
• Doing a final review of the new documentation, and making any required updates/cross-references
• Redirecting the old page to the manual.