This gist help you to seperate files in your folder and copy paste them according to there extensions :D

copy.js

const fs = require('fs');
const path = require('path');

var copyFile = (file, dir2) => {
  var f = path.basename(file);
  var source = fs.createReadStream(file);
  var dest = fs.createWriteStream(path.resolve(dir2, f));

  source.pipe(dest);
  source.on('end', function () {
    console.log('Succesfully copied');
  });
  source.on('error', function (err) {
    console.log(err);
  });
};

const logic = () => {
  let fileNames = fs.readdirSync('./');
  console.log('number of files in the the directory: ' + fileNames.length);
  fileNames.forEach((fileName) => {
    console.log(fileName);
  });
  console.log('Files names ending with .h');
  let i = 0;
  fileNames.forEach((fileName) => {
    if (fileName.endsWith('.h')) {
      i = i + 1;
      console.log(fileName);
      copyFile(`./${fileName}`, './headers');
    }
  });
  // if you want to copy paste some other type of file
  console.log('Number of files .h files in the directory: ' + i);
  i = 0;
  console.log('Files names ending with .cpp');
  fileNames.forEach((fileName) => {
    if (fileName.endsWith('.cpp')) {
      i = i + 1;
      console.log(fileName);
      copyFile(`./${fileName}`, './source_files');
    }
  });
  console.log('Number of files .cpp files in the directory: ' + i);
};

logic();

Acknowledgment:

1. https://melvingeorge.me/blog/get-name-of-all-files-directory-nodejs
2. https://coursesweb.net/nodejs/move-copy-file