[feat] Ollama support

[Denis-hamon]

Describe the feature

• Implement a direct connection to the Ollama API (http://localhost:11434/)
• Model Management: Add functionality to pull and manage Ollama models directly from our interface, leveraging Ollama's extensive model library
• User-Friendly Setup: Implement a guided setup process to help users install and configure Ollama if not already present on their system.
• Error Handling: Implement robust error handling and logging to address common Ollama issues, such as installation problems or model loading errors6.