Fix href link to Nextjs link

[thuyvy3110]

Change all hash href link from normal link a to Nextjs Link #43

[vercel]

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[DeKal]

The test case is failed because we trying to use Link while mock a click to redirect with Jest
vercel/next.js#1827 (comment)
see link for related solution

const actionWithPromise = () => {
  return new Promise((resolve) => resolve());
};

const mockedRouter = {
  push: actionWithPromise,
  replace: actionWithPromise,
  prefetch: () => {},
};

// @ts-ignore
Router.router = mockedRouter

[thuyvy3110]

Using Link Nextjs could not help the Scroll more smoothly, it's better to use Link to link two or more pages but in our case no useful here