Generalise project

[jnywong]

Context

Currently the project is designed to work with a 2i2c z2jh style deployment, but there are several places where we can make things more configurable.

This issue is a placeholder for discussing where deployments may differ, and how the cost monitoring project can accommodate.

[jnywong]

Hey @yijunge-ucb 👋 I created this issue for us to discuss how we can make this project generalisable, starting with at least the hubs that you manage :)