Support exporting types

[Kyriakos-Bekas]

I am using this package with TypeScript and Vite.
Vite does not support require, so I want to import the module with ES import as shown below.

import docusaurusPluginImageZoom from 'docusaurus-plugin-image-zoom';

This line, however, has TypeScript yield the following

Could not find a declaration file for module 'docusaurus-plugin-image-zoom'.
'<redacted>/node_modules/docusaurus-plugin-image-zoom/src/index.js' implicitly has an 'any' type.

I acknowledge that the package is written in plain JS and is therefore not exporting any types, but I believe this is a feature that could reduce bugs, improve the workflow of implementing fixes also enable more contributions.

I would personally consider helping with the transition to TypeScript.

Thanks for your effort and time and great job by the way!!