Allow assembly encapsulated rules

[nt5689]

Creating rules in .rule files is a kind of scripting with no intellisense and syntax checking. This is error prone and time consuming for most users.

When a mechanism is provided that allow rules to be encapsulated in dynamically loaded compiled assemblies.
This would require some kind of base class that can be used to build rules.
Since most of the objects are already available in the current code base, the effort should me minimal to provide this feature.

Users can use there favourite code editor to do:

• syntax checking
• write unit/integration tests with code coverage
• compile

This could be later extended, with automated build and release pipelines for deploying and testing rules .