Enhance README with status and information badges

Added badges for CI, release, license, downloads, and Python version to README.

Author: dturovskiy

README.md

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+[![Release](https://img.shields.io/github/v/release/dturovskiy/bear_data_export_bundle)](https://github.com/dturovskiy/bear_data_export_bundle/releases/latest)
+[![License](https://img.shields.io/github/license/dturovskiy/bear_data_export_bundle)](https://github.com/dturovskiy/bear_data_export_bundle/blob/main/LICENSE)
+[![Downloads](https://img.shields.io/github/downloads/dturovskiy/bear_data_export_bundle/total)](https://github.com/dturovskiy/bear_data_export_bundle/releases)
+[![Python](https://img.shields.io/badge/python-3.9%2B-blue)](https://www.python.org/)
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 # Binance OHLCV CSV Exporter (Spot)
 
 A lightweight Python CLI tool that exports historical OHLCV (Open, High, Low, Close, Volume) candlestick data from the **Binance Spot** market into CSV files. Uses the public [Binance Market Data](https://data-api.binance.vision) endpoint — **no API key required**.