Add guidance/documentation for MS Dynamics CRM integration

[kbaley]

As per https://github.com/Particular/NServiceBus/issues/5311 there are possible problems with NSB and Dynamics CRM.

There is no guidance on how to make NServiceBus work when ILMerging (aka Dynamics CRM integration). Given that we have never explicitly excluded the Dynamics CRM section of the market, and that the environment seems to have unique problems, we should look at what guidance/documentation can be created to assist people working in that area and trying to use NSB.