MS365:Add list of categorization details for specific events

Add list of event types that are processed. Documentation for packs lacks detail.

- Add compliance events (https://github.com/Graylog2/graylog-project-illuminate/pull/2304)

Start with the linked pull request to identify the MS365 event types and the compliance events to document, then locate the corresponding pack documentation in this repository. Add a complete list of processed event types, including compliance events; the issue is done when the documentation provides the missing categorization details.

Written by the indexing model from the issue text.