[Development] [WIP] Add new api for getting and setting object states which supports custom serialization

[MatthewChang]

Adds a new api for getting and setting object states which supports custom serialization

Motivation and Context

This will allow us to

1. query the state of a single object while still injecting the default value when necessary. and
2. Support compound/non-primitive state values for object states.

How Has This Been Tested

Unit testing

Checklist

• [ x] My code follows the code style of this project.
• I have updated the documentation if required.
• I have read the CONTRIBUTING document.
• [ x] I have completed my CLA (see CONTRIBUTING)
• [x ] I have added tests to cover my changes if required.