Added MacQA, a one-clickable app implementation to DocQA(DO_NOT_REVIEW, waiting for 0.1)

[wukaixingxp]

What does this PR do?

This PR adds a one-clickable app implementation to existing DocQA example, where user can choose local provider like Ollama or cloud provider like together or fireworks to do RAG. It allows users to install the MacQA app into the Application folder from the MacQA.dmg file. This MacQA app leverages llama-stack new LlamaStackAsLibraryClient feature and make every agentic component in-line. This PR also explains the steps for building this app.

This PR is created on top of existing DocQA example and renamed the previous Docker pipeline as DockerQA.

Before submitting

• This PR fixes a typo or improves the docs (you can dismiss the other checks if that's the case).
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• Did you make sure to update the documentation with your changes?
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Thanks for contributing 🎉!

[HamidShojanazeri]

@wukaixingxp I wonder if there is a chance to consolidate app.py and MacA.py?

[wukaixingxp]

@wukaixingxp I wonder if there is a chance to consolidate app.py and MacA.py?

Sure, there is a different behavior regarding how to launch Ollama between MacQA.py and app.py, maybe I can have a system env "USE_DOCKER" to control that.

Update on Jan 13: The merge has been completed in f610415. Please take a look