Document TRE Conditional Access Policies / MFA usage

[JC-wk]

Is your feature request related to a problem? Please describe.
I can not see any documentation or guidance on MFA / Conditional Access Policies, I think this would be helpful to all TRE users do have some basic docs and recommendations around this subject.

Describe the solution you'd like
A clear and concise description of how to configure Conditional Access Policies for TRE.

Describe alternatives you've considered
Asking an LLM / reading Microsoft docs

[marrobi]

This should cover TRE wide conditional access, how to do conditional access on a per workspace basis to limit access from certain locations - regions or Ip ranges. Do not duplicate the Microsoft docs, link where appropriate. This should be a separate page available in the mkdocs index with similar technical content.