✨ Introduce a shared library for agentic workflows

[pranavgaikwad]

This adds two things:

1. A new module agentic that contains all logic of our agents decomposed in a way that we can mix match the agents to create complex workflows
   • Supports streaming all ongoing work back to callers via events
   • Adds tool use support to models that may not have native tool calling: provides a base class that hides all the details around tool calling making stream() calls transparent no matter what the model
   • Allows stopping workflows for user inputs
2. Uses flag agentMode to enable a basic agent in getSolution that takes initial response as input and generates additional fixes.

[sjd78]

Just a few thoughts about the package setup.