function addSymlink(packageName, modulePackageName) {
  fs.symlinkSync(
    `${BASE_PATH}/modules/${packageName}/${modulePackageName}`,
    `${BASE_PATH}/node_modules/@gqlapp/${decamelize(packageName, { separator: '-' })}-${modulePackageName}`
  );
}
Adds a symlink.

@param packageName - The application package ([client|server])
@param modulePackageName - The name of the package of a new module ([client-react|server-ts] etc.)