Support Creating Ollama Model from Local Files

[BruceMacD]

Current Situation

The Ollama API supports creating models from local files via its REST endpoints
The ollama-js SDK currently does not implement this functionality
Implementation is blocked by Node.js file upload streaming challenges

Technical Details

The main blocker is handling large file uploads efficiently in Node.js when streaming to the Ollama API. Specific challenges include:

• Maintaining memory efficiency with large model files, we can't just read them into memory
• Handling chunked uploads consistently, checksums were failing in previous implementations
• Managing proper content-type and multipart form data boundaries
• Ensuring reliable error handling during long-running uploads