#31 Assembly Restructure

[SimonGeering]

Resolves #31 Assembly restructure to clean architecture

• [x] Project name and folder restructuring
• [x] Add new ChatterBot.Domain and ChatterBot library projects to Core and ChatterBot.Infra to Infra
• [x] Break out POCOs and Interfaces into ChatterBot library
• [x] Break out misc infrastructure (external dependency related code) into ChatterBot.Infra - Skipped as not needed
• [x] Break out main domain logic services (Stateless Behavior) and DomainEntities (Stateful Behavior) into ChatterBot.Domain
• [x] Update root namespaces of projects to match project name/location as required.
• [x] Add DI extension to new assemblies and integrate with composition root in Test and UI projects.
• [ ] Update namespaces of code files to match root namespace changes - TODO as subsequent PR as needs an agreement to be reached with @benrick if namespaces are to be moved out of Core.

[SimonGeering]

@benrick this is ready for review. I have deliberately left in the Core folders and the namespaces are un-changed to ensure non-breaking compatibility.

That having been said I would argue that the Core namespace can be removed, with classes migrated into the Domain, UI, and Infra namespaces or sub-namespaces thereof.

This could be done as one or two subsequent PRs, depending on if you want to do the namespace change and file system change in one go, or do the namespace change as a preliminary PR to chat it all works and move the files after that.

[benrick]

Same PR or separate PR doesn't matter to me, as long as it's at least 2 separate commits when doing it. Helps to avoid small files getting mistaken for an add/delete instead of a move.