Browse the offline documentation using Yelp

For 1.1, we’re moving back to browsing it using the Tor Browser, but we would like to go back to Yelp.

Subtasks

• #7390 (closed)
• #7285 (closed)
• #6570 (closed)
• #15633 (closed)

Related issues

• Related to #6434 (closed)
• Related to #14962 (closed)

Original created by @intrigeri on 7409 (Redmine)