Convert ResourceContainer from class to functional component

[jocelynn1uphealth]

Background:

Functional components are smaller, more performant, and more modern than legacy class-based ones. Let's convert the ResourceContainer class to a functional component to improve the bundle size + performance of this library

Expected Behavior:

• No user-facing changes will result from this change.
• The ResourceContainer class is gone and replaced with a functional component of the same name.
• All stories + supporting documentation are updated

[patrick-1upHealth]

@jocelynn1uphealth Looks like this one is already a class-based component. We'll still need to revisit this one after the TypeScript issue is finished.