Feat: Support macOS and Windows, migrate JavaScript to TypeScript (#32)

- Support macOS and Windows (Close #24 )
- Refactoring
  - Error handling
  - TypeScript
- Prettier (Close #29 )
- GHA: Add upload-artifact step for test coverage
- deps: Install husky

__tests__/get-os.test.ts

@@ -0,0 +1,18 @@
+import getOS from '../src/get-os';
+
+describe('getOS', () => {
+  test('test', () => {
+    expect(getOS('linux')).toBe('Linux');
+    expect(getOS('darwin')).toBe('macOS');
+    expect(getOS('win32')).toBe('Windows');
+  });
+
+  test('test exception', () => {
+    // expect(() => {
+    //   getOS("win32");
+    // }).toThrowError("Windows is not supported");
+    expect(() => {
+      getOS('centos');
+    }).toThrowError('centos is not supported');
+  });
+});