Component regisration support PubSub & Bindings.

[tmacam]

Description

Component registration support for PubSub & Bindings, along the two other StateStore "facets" that were added but not supported before.

Checklist

Please make sure you've completed the relevant tasks for this PR, out of the following list:

• [ ] Code compiles correctly
• [ ] Created/updated tests
• [ ] Extended the documentation