0.4.2

What's changed

• Enhanced tooling integration: Introduced the agent tools command for
  seamless integration with external tools via MCP.
• Core system updates: Significant updates were made to model, embedding,
  and RAG handling. This includes refactoring model creation, updating embedding
  models, adding Chroma backups, and supporting Gemini 2.5 multimodal models.
• Flexible task execution: Docs Agent tasks can now execute custom scripts
  directly using the new script function within runtask.
• Improved input handling: The CLI and task files now offer enhanced support
  for specifying multiple input files. Use either repeated --file flags or
  a --list_file flag pointing to a file list.