A primer on how the script is run will be good (client.py)

**Is your feature request related to a problem? Please describe.**
#23 #24 
It took me a while to understand how the MCP library passed the Python environment to the spawned process. 

**Describe the solution you'd like**
Something like https://github.com/modelcontextprotocol/quickstart-resources/issues/24#issuecomment-2750811019 in the docs would be helpful for newcomers.
