doc: Disable sphinx.ext.viewcode
This extension provides the syntax-highlighted HTML pages containing plain Python code, which clutters the search box results. Since nobody is really using that feature, disable it.
GitLab Maintenance scheduled for Thursday, 18th December 2025, from 7:00 AM to 10:00 AM BST. GitLab will be in read-only mode and experience short periods of complete downtime (up to 20 minutes) during this window.
This extension provides the syntax-highlighted HTML pages containing plain Python code, which clutters the search box results. Since nobody is really using that feature, disable it.