Added parent field to Hayagriva YAML export

[JawadTUE]

Closes #10596

The parent field is added to the Hayagriva YAML exporter, which was introduced in #10451

Previously, the exporter neglected some fields, addressing two specific cases:

1. Case 1 (entry type: article):
   • The journal field is now included under the parent field in addition to volume, issue, and publisher (if present).
2. Case 2 (entry type: book):
   • The series field is now included under the parent field.
   • The issue and publisher are also added for books

I confirmed that the exported .yaml file works with the typst system by using hayagriva literature.yaml reference as stated in their documentation.

Also, I compared the exports of the typst system with the exports from jabref and they contained the same fields.

Mandatory checks

• Change in CHANGELOG.md described in a way that is understandable for the average user (if applicable)
• Tests created for changes (if applicable)
• Manually tested changed features in running JabRef (always required)
• Screenshots added in PR description (for UI changes)
• Checked developer's documentation: Is the information available and up to date? If not, I outlined it in this pull request.
• Checked documentation: Is the information available and up to date? If not, I created an issue at https://github.com/JabRef/user-documentation/issues or, even better, I submitted a pull request to the documentation repository.

[Siedlerchr]

Thanks a lot!