ADK Docs: Testing page title is mis-leading

[msampathkumar]

Is your feature request related to a problem? Please describe.

ADK provide CLI, WEB & API server to experiment with ADK Agents. Especially the API server was almost hidden in plain sight (https://google.github.io/adk-docs/get-started/testing/)

This page title says Testing which mis-inform users like me.

Describe the solution you'd like

Task1: Provide API naming for this above page or split into 2 page. One page is focussed on ADK API_SERVER page and other focussed on how to use API_Server for fast testing and other.

Task2: Provide a new page to demonstrate and highlight all feature adk offers

Describe alternatives you've considered

None

Additional context

Learning ADK.