Add support for markdown and plain text reporting to MinimalPermissionsGuidancePlugin

[bartizan]

MinimalPermissionsGuidancePlugin seems to be missing any reporting possibility.
Let's add support for markdown and plain text reporting to MinimalPermissionsGuidancePlugin (like it is in GraphMinimalPermissionsGuidancePlugin)

[bartizan]

I'll get on the issue once it is confirmed.

[waldekmastykarz]

Great suggestion! All yours!