Include generated module-i18n.php file in repository

[felixarntz]

Summary

#59 introduced a generated module-i18n.php file that contains all the available module names and descriptions so that these are recognized as translatable strings in the plugin repository. This file was originally .gitignored, however that was not fully thought through.

The release instructions state that updating these strings is part of the release tasks, and our automated deployment task relies on all relevant files being part of the repository.

So, while this is a generated file, we should still include it in the repository. This makes deployment straightforward, as without this PR the plugin would be missing the file. The change furthermore ensures that the plugin still works even when somebody downloads it manually from GitHub as a ZIP file.

Relevant technical choices

• Remove module-i18n.php from .gitignore.
• Fix typo in Web Support module name (should be WebP Support).
• Make sure all strings in the file are their latest versions (by running npm run translations).

Checklist

• PR has either [Focus] or Infrastructure label.
• PR has a [Type] label.
• PR has a milestone or the no milestone label.