📝 Regenerating old versions of API reference

[LVMVRQUXL]

📝 Description

For having a version selector in the API reference, we want to regenerate it for prior versions using a multi-module structure with Dokka.

✅ Checklist

• [ ] 🎉 Within a new archive directory, create a v4.5.0 Gradle project with the main sources of Kotools Types 4.5.0.
• [ ] 🔧 Configure the v4.5.0 project for generating its multi-module API reference.
• [ ] 📝 Include the API reference of v4.5.0 into the API reference of the root project.
• [ ] ...
• [ ] 📝 Add an entry for this issue in the unreleased changelog.

[LVMVRQUXL]

We managed to make the old documentation work with the new one! See commit ddb07067.