### Preliminary Checks - [x] I have searched existing issues for a duplicate feature request and I'm sure this is new. - [x] I have read and followed [the docs](https://nrel-distribution-suites.github.io/grid-data-models) and still think this is missing. ### Description Add models to represent Price signals, aggregators, controllable loads, and other associated models Enables a lot more potential use cases for CADET
Preliminary Checks
Description
Add models to represent Price signals, aggregators, controllable loads, and other associated models
Enables a lot more potential use cases for CADET