Data collections and collection references

[bholmesdev]

Summary

This introduces two related features to content collections:

• Data collections: A way to store JSON files as collections
• References: A way to reference collection entries from another collection

Links

• Fully rendered proposal 1 - data collections
• Fully rendered proposal 2 - collection references
• Stage 2 proposal: https://github.com/withastro/roadmap/issues/530
• Stage 1 proposals: https://github.com/withastro/roadmap/discussions/477, https://github.com/withastro/roadmap/discussions/525

https://user-images.githubusercontent.com/51384119/235771035-f48d162c-84f0-424b-997f-45da55252597.mp4

[bholmesdev]

Thanks for your contributions everyone! We're looking to reach consensus on this RFC by end of the week, so please share any final feedback (blocking or otherwise) that you want us to address. If we don't hear anything, that's our go-ahead to ship 🚢

[bholmesdev]

Well, I'll take your stunned silence as a "ship it!" Merging