Add Skyulf to AutoML tools list in README

[flyingriverhorse]

Skyulf is an open-source MLOps web application designed to orchestrate end-to-end machine learning workflows. It provides a modular system for:

• Creating and managing data ingestion pipelines
• Designing feature engineering steps
• Triggering and monitoring model training jobs
• Visualizing workflows using an interactive React Flow–based UI
• Running asynchronous tasks through Celery + Redis
• Exposing a clean, API-first architecture built with FastAPI

Skyulf helps developers quickly bootstrap production-ready MLOps infrastructure without manually wiring backend, orchestration, and UI components from scratch.