[Docs] Add canonical url to the docs #29652
Description
As a help in consolidating links/searches to the main pages, we can add <link rel="canonical" href="..." /> in the head of the doc pages. This is actually something that sphinx supports with the html_baseurl option.
Reporter: Joris Van den Bossche / @jorisvandenbossche
Assignee: Joris Van den Bossche / @jorisvandenbossche
PRs and other links:
Note: This issue was originally created as ARROW-14055. Please see the migration documentation for further details.