docs(angular): add interceptors content (#6527)

src/data/roadmaps/angular/content/writing-interceptors@xG7iSVOGcbxJbNv3xbNfc.md

@@ -1 +1,9 @@
-# Writing Interceptors
+# Writing Interceptors
+
+Interceptors are middleware that allows common patterns around retrying, caching, logging, and authentication to be abstracted away from individual requests.
+
+Visit the following resources to learn more:
+
+- [@official@Angular Official Docs - Interceptors](https://angular.dev/guide/http/interceptors)
+- [@article@Angular Interceptor](https://www.scaler.com/topics/angular/angular-interceptor/)
+- [@video@Interceptors in Angular](https://www.youtube.com/watch?v=w1_AmHv2LmA)