Add docs for Alluxio file system

[jja725]

Description

Add docs for Alluxio file system.

Additional context and related issues

Docs for #21603

Release notes

(x) This is not user-visible or is docs only, and no release notes are required.

[github-actions]

This pull request has gone a while without any activity. Tagging the Trino developer relations team: @bitsondatadev @colebow @mosabua

[mosabua]

I did a bunch of updates for grammar and setup so the docs actually build and work. Left a few questions but in general this looks good. I am wondering if we should have a minimal example of the properties file though .. and then link to the Alluxio docs for me.

Also please review all content I updated and update as needed and push further changes @jja725

[jja725]

I did a bunch of updates for grammar and setup so the docs actually build and work. Left a few questions but in general this looks good. I am wondering if we should have a minimal example of the properties file though .. and then link to the Alluxio docs for me.

Also please review all content I updated and update as needed and push further changes @jja725

Added example property file. The updates LGTM, thanks for collaborating on this!

[mosabua]

Looks good now. Thank you @jja725