refactor: add loading component and demo

vben

2020-12-01 5db3ce773793d06fa17336aca42470d2aae93fb8

 src/locales/lang/en/routes/demo/comp.ts

@@ -24,4 +24,6 @@
  qrcode: 'QR code',
  strength: 'Password strength',
  upload: 'Upload',

  loading: 'Loading',
};