feat(oi): add open interest scraper module

add new oi_scraper directory for collecting open interest data
and update the main EA to integrate with the scraper functionality

oi_scraper/.env.example

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+# CME Group QuikStrike Login Credentials
+CME_USERNAME=your_username_here
+CME_PASSWORD=your_password_here
+
+# Product Configuration
+# Gold (XAUUSD/COMEX Gold - OG|GC): pid=40
+# Default product for XAUUSD trading
+PRODUCT_URL=https://cmegroup.quikstrike.net/User/QuikStrikeView.aspx?pid=40&viewitemid=IntegratedOpenInterestTool
+
+# Alternative products:
+# SOFR (3M SOFR): https://cmegroup.quikstrike.net/User/QuikStrikeView.aspx?pid=476&viewitemid=IntegratedOpenInterestTool
+# Silver: https://cmegroup.quikstrike.net/User/QuikStrikeView.aspx?pid=41&viewitemid=IntegratedOpenInterestTool
+
+# Gold Price Source (investing.com)
+INVESTING_URL=https://www.investing.com/commodities/gold
+
+# Output Settings
+CSV_OUTPUT_PATH=./oi_data.csv
+TOP_N_STRIKES=3
+
+# Scraping Settings
+HEADLESS=false  # Set to true for production
+TIMEOUT_SECONDS=30
+RETRY_ATTEMPTS=3
+
+# Logging
+LOG_LEVEL=INFO  # DEBUG, INFO, WARNING, ERROR