docs: update README and add test infrastructure

- Enhance .gitignore with comprehensive Python patterns
- Improve README with better setup and testing instructions
- Add test infrastructure:
  * Test requirements file
  * Environment setup script
  * Test runner script
  * Comprehensive test suite
  * Coverage configuration

run_tests.sh

@@ -0,0 +1,25 @@
+#!/bin/bash
+# run_tests.sh
+
+# Check if virtual environment exists
+if [ ! -d "venv" ]; then
+    echo "Virtual environment not found. Setting up..."
+    ./setup_test_env.sh
+fi
+
+# Activate the virtual environment
+source venv/bin/activate
+
+# Run tests with coverage
+echo "Running tests with coverage..."
+coverage erase  # Clear any previous coverage data
+python -m pytest tests/ --cov=. --cov-config=.coveragerc -v
+
+# Generate HTML coverage report
+echo "Generating HTML coverage report..."
+coverage html
+
+echo "Coverage report generated in htmlcov/ directory"
+
+# Deactivate virtual environment
+deactivate