Enhance Jest configuration and testing infrastructure

- Updated Jest configuration to support ESM and improve test coverage
- Added comprehensive test files for helpers, index, context, and HASS integration
- Configured coverage reporting and added new test scripts
- Updated Jest resolver to handle module resolution for chalk and related packages
- Introduced new test setup files for mocking and environment configuration

jest.setup.cjs

@@ -0,0 +1,32 @@
+// Mock chalk module
+jest.mock('chalk', () => ({
+    default: {
+        red: (text) => text,
+        green: (text) => text,
+        yellow: (text) => text,
+        blue: (text) => text,
+        magenta: (text) => text,
+        cyan: (text) => text,
+        white: (text) => text,
+        gray: (text) => text,
+        grey: (text) => text,
+        black: (text) => text,
+        bold: (text) => text,
+        dim: (text) => text,
+        italic: (text) => text,
+        underline: (text) => text,
+        inverse: (text) => text,
+        hidden: (text) => text,
+        strikethrough: (text) => text,
+        visible: (text) => text,
+    }
+}));
+
+// Mock environment variables
+process.env.HASS_URL = 'http://localhost:8123';
+process.env.HASS_TOKEN = 'test_token';
+process.env.CLAUDE_API_KEY = 'test_api_key';
+process.env.CLAUDE_MODEL = 'test_model';
+
+// Global Jest settings
+jest.setTimeout(30000); // 30 seconds timeout