ci: Check codemeta/zenodo with AUTHORS/CONTRIBUTORS

[ChristianTackeGSI]

If AUTHORS or CONTRIBUTORS are changed, check that the changes are merged into codemeta.json, and .zenodo.json.

See: https://github.com/FairRootGroup/FairRoot/pull/1475

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Checklist:

• [X] Rebased against dev branch
• [X] My name is in the resp. CONTRIBUTORS/AUTHORS file
• [X] Followed the seven rules of great commit messages

[coderabbitai[bot]]

Walkthrough

## Walkthrough A new GitHub Actions workflow has been added to ensure the consistency of metadata files within a repository. Whenever changes are pushed or pull requests are made, this workflow triggers a Python script to update and check the metadata files like `AUTHORS`, `CONTRIBUTORS`, and JSON files used for project metadata management. It operates in the latest Ubuntu environment and leverages `git diff` to verify if updates were made correctly. ## Changes | File Path | Change Summary | |-----------------------------------------|------------------------------------------------------------------| | `.github/workflows/.../check_metadata.yaml` | Introduced a workflow to check and update metadata files on push or pull request events. |

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