feat(angular/communication): add content to the threads (#6506)

* feat(angular): add ViewChild content

* feat(angular): add ContentChild content

* feat(angular): add Parent-Child Interaction content

src/data/roadmaps/angular/content/contentchild@oQl9etjoHiU2JgxieUOEH.md

@@ -1 +1,9 @@
 # ContentChild
+
+Content queries retrieve results from the elements in the component's content— the elements nested inside the component in the template where it's used.
+
+Visit the following resources to learn more:
+
+- [@official@Content queries - signal](https://angular.dev/guide/signals/queries#content-queries)
+- [@official@Content queries](https://angular.dev/guide/components/queries#content-queries)
+- [@official@contentChild - API](https://angular.dev/api/core/contentChild)

src/data/roadmaps/angular/content/parent-child-interaction@TDyFjKrIZJnCjEZsojPNQ.md

@@ -1 +1,7 @@
 # Parent-Child Interaction
+
+In angular parent-child communication is commonly used to share data between two components.
+
+Visit the following resources to learn more:
+
+- [@article@Medium - Parent-Child Communication](https://jaspritk.medium.com/parent-child-communication-in-angular-888373e0b69e)

src/data/roadmaps/angular/content/viewchild@v0XaLNZ-YrRqP-xv8wS43.md

@@ -1 +1,11 @@
 # ViewChild
+
+View queries retrieve results from the elements in the component's view — the elements defined in the component's own
+template.
+
+Visit the following resources to learn more:
+
+- [@official@View queries](https://angular.dev/guide/components/queries#view-queries)
+- [@official@viewChild - signal](https://angular.dev/guide/signals/queries#viewchild)
+- [@official@viewChildren - signal](https://angular.dev/guide/signals/queries#viewchildren)
+- [@official@viewChild - API](https://angular.dev/api/core/viewChild)