feat: add IPTC, EXIF and XMP metadata attributes to image elements

[therobrob]

• added EXIF and IPTC metadata support for artist and CopyrightNotice fields.
• added the information to figcaption
• modified intercity direct map – apparently, the metadata doesn't work with WebP, so I uploaded it as a JPG for now.

ToDos:

• add an note to archetypes.
• check webp support
• our webp images seem to have no copyright information anymore. We have to restore it / add it manually again..

[netlify]

✅ Deploy Preview for fipguide ready!

Name	Link
🔨 Latest commit	28e8b59
🔍 Latest deploy log	https://app.netlify.com/projects/fipguide/deploys/6a05d19fb2cb150008368f25
😎 Deploy Preview	https://deploy-preview-951--fipguide.netlify.app
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.
🤖 Make changes	Run an agent on this branch

---

To edit notification comments on pull requests, go to your Netlify project configuration.

[github-actions]

Hi there! 👋

Thank you for your contribution to the FIP Guide! 🚀
We appreciate your effort in making rail staff travel information more accessible. 🚄

Checklist before merging:

• Added a description to the Pull Request
• Checked the License of new pictures (non-commercial use without attribution)
• Modified content in English
• Modified content in German
• Modified content in French