docs: update project structure and add database documentation

- Add tests/ directory to .gitignore
- Document database connectivity with pyodbc and config
- Add project structure and file organization guidelines
- Update installation steps to use requirements.txt
- Document new dependencies: pandas, openpyxl, pyodbc

requirements.txt

@@ -0,0 +1,19 @@
+# ===========================
+# Playwright Python Automation
+# ===========================
+# Python 3.8+ required
+
+# --- Browser Automation ---
+playwright==1.57.0
+
+# --- Database ---
+pyodbc>=5.0.0
+
+# --- Excel/Data Processing ---
+pandas>=2.0.0
+openpyxl>=3.1.0
+numpy>=1.24.0
+
+# --- System Utilities (installed via pip) ---
+python-dateutil>=2.8.0
+pytz>=2023.0