Chore/unit test (#538)

* chore: add unit test

* chore: add github action for unit test

jest.config.js

@@ -0,0 +1,19 @@
+/** @type {import('ts-jest').JestConfigWithTsJest} */
+module.exports = {
+  projects: ['<rootDir>/packages/app'],
+  preset: 'ts-jest',
+  testEnvironment: 'node',
+  moduleNameMapper: {
+    '^(\\.{1,2}/.*)\\.js$': '$1',
+  },
+  transform: {
+    // '^.+\\.[tj]sx?$' to process js/ts with `ts-jest`
+    // '^.+\\.m?[tj]sx?$' to process js/ts/mjs/mts with `ts-jest`
+    '^.+\\.tsx?$': [
+      'ts-jest',
+      {
+        useESM: true,
+      },
+    ],
+  },
+};