Custom fields page with ressources

docs/docs/custom-fields.md

@@ -0,0 +1,39 @@
+---
+title: Custom fields
+tags:
+  - content-type-builder
+  - plugins
+---
+
+# Custom fields
+
+## Summary
+
+_Description of the software system / component._
+
+## Detailed design
+
+- _Explaining the software design and reasoning._
+- _Api specifications._
+- _Benchmarks_
+- _Add necessary diagrams and code examples._
+- _Think about edge-cases and include examples._
+
+## Tradeoffs
+
+_What potential tradeoffs are involved with this system/implementation._
+
+- _Complexity._
+- _Limitations of the feature itself._
+- _How does this proposal integrate with the current features implemented._
+
+## Alternatives
+
+_What other approaches did we consider?_
+
+## Resources
+
+- [Custom Fields page](https://strapi.io/custom-fields)
+- [Docs Beta](https://docs-next.strapi.io/developer-docs/latest/development/custom-fields.html)
+- [non-technical RFC](https://github.com/strapi/rfcs/pull/40)
+- [technical RFC](https://github.com/strapi/rfcs/pull/42)