crewAI 1.15.2 adds dynamic LLM loading, inline skills, and flow definitions

The crewAI team released version 1.15.2, introducing several new features for agent configuration and flow management.

• Pull latest LLM models dynamically in the crew wizard.
• Support inline skill definitions and generated Flow Definition authoring skill.
• Implement message setup and feedback handling in AgentExecutor.
• Define stream frame protocol for flows and add repository agents to flow definitions.
• Key model-catalog cache by exact API key, shorten TTL, and skip Ollama.
• Resolve pip-audit failures for onnx 1.22.0 and nltk PYSEC-2026-597.

This update enhances the flexibility of crew configurations and improves security by addressing dependency vulnerabilities.