BigQuery Select * Cost Guard

**Save money and avoid accidental high-cost queries in BigQuery!**
> BigQuery Cost Guard is a must-have tool for data engineers and analysts. It acts as a safety net, warning you before you run expensive queries.
**Features:**
> * **⚠️ Smart Warnings**: Detects `SELECT *` and warns you immediately.
> * **💰 Cost Threshold**: Set your own budget (e.g., 100 MB). You'll only be warned if the query cost exceeds this limit.
> * **🛑 Run Confirmation**: Blocks the "Run" button and shows a confirmation dialog if the cost is too high.
> * **⚡️ Real-time Cost Flashing**: Highlights the query cost in red to grab your attention.
> * **🔒 Privacy Focused**: Runs entirely locally in your browser. No data is sent to any server.