GitHub Action for automatically attaching the mod to a release

[cloudmaker97]

This pull request introduces a new GitHub Actions workflow to automate the process of attaching a mod asset to a release. The workflow is triggered when a release is published by a maintainer, and includes steps to create a zip archive of the release and upload it as an asset.

Example:

• A commit has been marked as new release, a maintainer creates a release on GitHub
• The release is published, the workflow starts then
• The GitHub actions are running and attaches the mod automatically to the release (duration ~15s)

Key changes:

• .github/workflows/assets-on-release.yml: Added a new workflow that triggers on release publication, creates a zip archive of the release, retrieves the latest release information, and uploads the asset file to the release.

Testing:

• I've tested the workflow and it is full functional and running, see here ✔️
• Test release: https://github.com/cloudmaker97/FS25_UniversalAutoload/releases/tag/v0.0.0.1-gh
• Action workflow: https://github.com/cloudmaker97/FS25_UniversalAutoload/actions/runs/12214614098