test: add CI/CD workflow

jest.config.js

@@ -0,0 +1,17 @@
+module.exports = {
+  preset: 'ts-jest',
+  testEnvironment: 'node',
+  roots: ['<rootDir>/src'],
+  testMatch: ['**/__tests__/**/*.ts', '**/?(*.)+(spec|test).ts'],
+  transform: {
+    '^.+\\.ts$': 'ts-jest',
+  },
+  moduleFileExtensions: ['ts', 'js', 'json', 'node'],
+  collectCoverageFrom: [
+    'src/**/*.{ts,js}',
+    '!src/tests/**',
+    '!**/node_modules/**',
+  ],
+  coverageDirectory: 'coverage',
+  setupFilesAfterEnv: ['<rootDir>/src/tests/setup.ts'],
+};