Netlify Build Fails Due to Private Git Dependency (plugin-image-zoom)

**Task description**:

- The Netlify build is currently failing during the dependency installation step with the following error:

```
Host key verification failed.
fatal: Could not read from remote repository.
...
Command: git ls-remote --tags --heads ssh://git@github.com/flexanalytics/plugin-image-zoom.git
```

- This happens because the project depends on a private GitHub repository via SSH in package.json. However, open-source projects must use only publicly accessible dependencies so that anyone (including CI services like Netlify) can build the site without special access.

- The goal of this task is to replace the private SSH dependency with the publicly available npm package [docusaurus-plugin-image-zoom ](https://www.npmjs.com/package/docusaurus-plugin-image-zoom).

**Solution**:
- Remove the current private dependency (likely listed as "plugin-image-zoom": "git+ssh://..." in package.json).
- Install the official public plugin:

```
yarn remove plugin-image-zoom
yarn add docusaurus-plugin-image-zoom
```

- Update docusaurus.config.js to reference the plugin by its full name:

```
plugins: [
// ...
"docusaurus-plugin-image-zoom", // use full package name
// ...
]
```

- Commit the updated package.json and yarn.lock.

**Who can join or take the task**:

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