[DQaC] Documentation and Examples

[edg956]

As a new user of the SDK
I want clear documentation and examples
So that I can quickly learn how to set up the environment, authenticate, and run tests.

Acceptance Criteria

• There is a “Getting Started” guide with installation, configuration, and examples.
• The documentation is automatically generated from docstrings and kept up to date.
• Example scripts demonstrate both classic and streaming runners.