Consume cogito

[mudler]

I recently moved most of the foundational logics around LocalAGI, LocalOperator and expanded a bit in https://github.com/mudler/cogito - This issue is to track the effort to refactor the LocalAGI code to consume cogito.

The benefits are obvious:

• fixes to cogito are inherited here automatically and shared across the stack that makes use of it
• cogito test suites are extensive and focused on the core business logic
• cogito has already new features that would be handy here
• cogito runs also with models of 0.6b of size