[DT-2692] feat: pick content relationship fields

[jomifepe]

Relates to: DT-2692

Description

When adding or editing a new field, have the ability to go through all the available fields from any custom type in the library and pick multiple.

Currently, it's only possible to pick fields from the first level, and we plan to implement two levels. Picking fields from the second level will be implemented in a different PR.

Preview

cr-field-picker.mp4

How to QA ¹

1. Launch slice-machine in this branch
2. Add a new Content Relationship field to any page/custom type
3. Use the new TreeView picker (as seen in the preview above)

Footnotes

1. Please use these labels when submitting a review:
   ❓ #ask: Ask a question.
   💡 #idea: Suggest an idea.
   ⚠️ #issue: Strongly suggest a change.
   🎉 #nice: Share a compliment. ↩

[linear]

DT-2692 Display custom types fields in CR modal using the TreeView component

[vercel]

The latest updates on your projects. Learn more about Vercel for Git ↗︎

Name	Status	Preview	Updated (UTC)
slice-machine	✅ Ready (Inspect)	Visit Preview	May 30, 2025 4:24pm

[lihbr]

Is it necessary to display/allow selecting the uid? It's always returned by the API and is not part of the data object: https://200629-sms-hoy.cdn.prismic.io/api/v2/documents/search?q=%5B%5Bat%28document.type%2C+%22kitchen_sink_4%22%29%5D%5D&ref=aDbsjxEAACwAkpaF&fetchLinks=post.title

[jomifepe]

Is it necessary to display/allow selecting the uid? It's always returned by the API and is not part of the data object: https://200629-sms-hoy.cdn.prismic.io/api/v2/documents/search?q=%5B%5Bat%28document.type%2C+%22kitchen_sink_4%22%29%5D%5D&ref=aDbsjxEAACwAkpaF&fetchLinks=post.title

That's a great point! Just double checked this with the team and it should in fact be omitted.

Nice catch! Done ✅

[xrutayisire]

Here is my initial review! UI looks super nice and aligned with design! ✨

[xrutayisire]

LGTM! 🚀