Framework Agnostic!

As the first step to becoming truly framework agnostic, AgentStack now officially supports scaffolding LangGraph agents!

Generate an agent with agentstack init --framework=langgraph <name>. View the generated graph at src/graph.py.
Add agents to the graph with agentstack generate agent <name> and assign them tasks with agentstack generate task <name>.

Absolutely huge props and thank you to @tcdent for being the engineer to architect this beast of an improvement.