Fix (Ollama provider): Unsupported operation: streaming not implemented

[Jovonni]

I'm not entirely sure if this is the right way to fix this issue, but here's what I ran into when using the goose desktop app installed from the site (v1.6.0):

implements streaming capability for ollama chat completions by:

• adding stream method to ollamaprovider
• using openai-compatible streaming format with stream=true
• handling streamed responses line by line with proper error handling
• including usage metrics in streamed responses
• maintaining compatibility with existing chat/auto modes

note

• this also occurs for all of my local ollama models
• not sure if this also closes Feature Request: Implement Streaming for Ollama Models #3527