Add smart_factory demo

[dilanpateldatabricks]

Summary

• Adds demos/smart_factory/ — an end-to-end IoT streaming demo showcasing Zerobus Ingest for factory sensor data.
• Pipeline: simulated machines → Zerobus (gRPC SDK) → SDP bronze/silver/gold → Lakeview dashboard, all governed by Unity Catalog.
• Ships with a React/Vite frontend (factory floor visualization + fault injection) and a Databricks Apps deployment via setup.sh <profile> <catalog>.

What's included

• src/ — FastAPI app, Zerobus client, simulator, UC setup SQL
• pipeline/ — bronze/silver/gold SQL for SDP
• frontend/ — React + TypeScript + Tailwind UI
• dashboards/smartfactory.lvdash.json — Lakeview dashboard
• databricks.yml, app.yaml, setup.sh — one-command deploy
• docs/demo-script.md, architecture diagram, README

Test plan

• Run ./setup.sh <cli-profile> <catalog> against a fresh catalog and confirm the app, pipeline, and dashboard deploy cleanly
• Verify simulator publishes events to Zerobus and bronze table populates
• Walk through the 6-minute demo script (Acts 1–5), including fault injection and resolution
• Confirm UC lineage shows raw → bronze → silver → gold → dashboard