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

setup_test_env.sh

@@ -0,0 +1,27 @@
+#!/bin/bash
+# setup_test_env.sh
+
+# Remove existing virtual environment if it exists
+if [ -d "venv" ]; then
+    echo "Removing existing virtual environment..."
+    rm -rf venv
+fi
+
+# Create a virtual environment
+python3 -m venv venv
+
+# Activate the virtual environment
+source venv/bin/activate
+
+# Upgrade pip
+pip install --upgrade pip
+
+# Install application dependencies
+pip install -r requirements.txt
+
+# Install test dependencies
+pip install -r requirements-test.txt
+
+echo "Virtual environment setup complete!"
+echo "To activate the virtual environment, run:"
+echo "source venv/bin/activate"