Add KaiROS AI as example application

[Copilot]

Adds KaiROS AI to the examples gallery - a production Windows WPF desktop application demonstrating local LLM inference with GPU acceleration, model management, and streaming chat UI.

Changes

• README.md: Added KaiROS AI to examples list
• docs/Examples/KairosAI.md: Created documentation page covering features, tech stack (.NET 9, WPF, CUDA 12), and use cases
• mkdocs.yml: Registered new documentation page in Examples navigation

Example demonstrates building a complete desktop application with LLamaSharp including model catalog, download management, streaming responses, and performance monitoring.

Original prompt

I have a Repo "https://github.com/avikeid2007/Kairos.local". Add it as an example in this repo and make a PR at the parent Repo(https://github.com/SciSharp/LLamaSharp)(Fork from )

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