code: function handleConfiguration(filePath) {
      if (fs.existsSync(filePath)) {
          filePath = path.resolve(filePath);
      }
      else {
          console.error('Invalid path to configuration file.');
          return 1;
      }
      return setupConfigurationFile(filePath);
  }
docs: Creates the .wistrc.json file from the user-defined configuration file.
  @param filePath Path to the user-defined configuration file.
  @returns {boolean} True if the creation of the configuration file succeeds, false if not.
  @private