Add new plugin hooks documentation

[cconard96]

WIP adding documentation from glpi-project/glpi#19450 to enhance the plugin hook documenation. This is all to add the documentation for the missing hooks, improve the overall quality of the documentation, document the new Hooks and HookManager classes, and make it less likely that the hook documentation becomes out of date again.

[trasher]

Diff is too huge, branch must be rebased