Farm help topic system

Scope and implement more robust help system within farmOS:

• In part, we need to begin thinking about the upcoming deprecation of Drupal's hook_help and start using Help topics available with Drupal 10.2.0 : https://www.drupal.org/project/drupal/issues/3031642
• Investigate if/how we can leverage help-topic system for farmOS-specific (user facing) help information
• Scope requirements for a farmOS-specific help system
• Generate proposal and communicate with community