Aggiunti nuovi script demo per i provider di mercato e rimosso codice obsoleto

demos/api_market_providers.py

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+from dotenv import load_dotenv
+from app.api.tools import MarketAPIsTool
+
+def main():
+    api = MarketAPIsTool()
+    prices_aggregated = api.get_historical_prices_aggregated("BTC", limit=5)
+    for price in prices_aggregated:
+        print(f"== [{price.timestamp}] {price.low:.2f} - {price.high:.2f} ==")
+
+if __name__ == "__main__":
+    load_dotenv()
+    main()