Component test and E2E test

[weicheng2138]

• implement vitest. vitest is a testing tool, not for component test.

• implement E2E test with testcafe

• vitest works with "@nuxt/test-utils": "^3.0.0-rc.3" to test SSR page.

• vitest cannot make unit test with @vue/test-utils to mount the component. But require @vitejs/plugin-vue to handle .vue file. Still figuring out...