Create planning_assistant_graph

Refactor planning assistant workflow and agent logic

Add smart planning assistant with parallel agents

Rename example scripts and add README

Add multi-agent leave policy and calendar demo scripts

Add simple agent weather example scripts

Add initial uv.lock dependency lockfile

Update devcontainer to use uv and adjust Python path

Add initial pyproject.toml configuration

Add devcontainer config and Dependabot setup

Create .gitignore