* moves AgentId into Agent
* Renames AgentRuntime to AgentMessenger (more accurate name)
* Remove IAgentRuntime Interface
* changes constructor of Agent to take IAgentWorker instead of IAgentRuntime
* move optional base agents to separate package
* rename main sdk to Core
* reduce dependency graph
Co-authored-by: @rysweet
Authored-by: @kostapetan
Co-authored-by: @kopetan-ms
* refactor renaming agent base
* 1st draft
* 1st draft
* format
* rename the tsts
* move IagentWorker
* 1st draft
* format
* gen-proto
* run gen-proto-samples
* format
* merge problem format