Add validation UX +API for all components in AGS

[victordibia]

The AutoGen Studio interface should have logic (UX and api endpoints) that can validate components. Now that all components are based on the component config spec we can simply do Component.load_component to validate.

Two high level goals here ...

• Support validation logic (fields)
• Support ability to independently test each component (e.g, run a model client and show resutls, run an agent, or run a team).

Having an API do this in a structured way enables extensiblity (validation occurs only at backend rather than frontend maintaining its own validation logic)