wip: support ollama

[arihanv]

why

Support open-source LLMs and VLMs - #183

what changed

• created client for Ollama
• currently supports llama-3.2 but other LLMs can be added to the list of available models
• created example navigating hackernews and extracting posts with llama 3.2

TODO

• Support vision models (llama-3.2-vision, moondream, etc.)
• Add other models to the available models list

[changeset-bot[bot]]

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Latest commit: 8e78f5b7e92c744c6a7b3f9dd7949480119750d9

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[kamath]

covered in #352