feat: add detect clones and statistic api

[fengliner]

• What kind of change does this PR introduce? (Bug fix, feature, docs update, ...)

feature: add detect clone and statistic api

• What is the current behavior? (You can also link to an open issue here)

Currently, get statistic data is not convenient. If you want to get statistic, you must write some code with @jscpd/core, @jscpd/finder and @jscpd/tokenizer.

issue: #536

• What is the new behavior (if this is a feature change)?

import {detectClonesAndStatistic} from "jscpd";

(async () => {
  const data = await detectClonesAndStatistic({
    path: [
      __dirname + '/../fixtures'
    ],
    silent: true
  });
  console.log(data.clones);
 console.log(data.statisticData);
})()

• Other information:

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This change is