Localization of AppImage Documentation

Hello, AppImage Team,

I’m glad to announce that the 🎉 **appimage-docs-l10n** 🎉 project is published now:

- 🚀 **Preview:** [appimage-docs-l10n](https://projects.localizethedocs.org/appimage-docs-l10n)
- 🌐 **Crowdin:** [appimage-docs-l10n](https://localizethedocs.crowdin.com/appimage-docs-l10n)
- 🐙 **GitHub:** [appimage-docs-l10n](https://github.com/localizethedocs/appimage-docs-l10n)

The goal of this project is to translate the AppImage documentation into multiple languages. Translations are contributed via the Crowdin platform, automatically synchronized with the GitHub repository, and can be previewed on GitHub Pages.

I noticed that the AppImage documentation homepage displays "Welcome" in different languages. I think the AppImage Team must have considered translating the documentation into multiple languages when they wrote it.

https://github.com/AppImage/docs.appimage.org/blob/475547d9d1cadfb8792fa9dc83cf62687ff323f1/source/index.rst?plain=1#L13

I believe that the `appimage-docs-l10n` project can fulfill this need.