jugaad-py/jugaad-trader ? reverse-engineered prompt

Build me a Python library for Zerodha that lets me log in, save a session, and then use that session to place trades and fetch my profile, order book, trade book, holdings, and margins.

I want a simple command line flow too, where I can start a session by entering my user ID, password, and PIN, then have the access token stored so the library can reuse it later. After that, I should be able to import the client in Python, create a Zerodha object, set the access token, and call methods like profile and the other common account and trading actions.

Please include a clean README with quick start steps, a few example scripts, and basic tests. If you need current Zerodha related details or API behavior, look up the latest docs online and make the implementation practical and easy to use.