docs(angular): add ui components content (#6450)

src/data/roadmaps/angular/content/ui-components@CZ1YRyai8Ds-ry4A8jVbr.md

@@ -1 +1,8 @@
-# UI Components
+# UI Components
+
+The Angular Material library, which is maintained by the Angular team, is a suite of reusable UI components that aims to be fully accessible. The Component Development Kit (CDK) includes the a11y package that provides tools to support various areas of accessibility.
+
+Visit the following resources to learn more:
+
+- [@official@Angular Official Docs - Angular UI Components](https://angular.dev/best-practices/a11y#angular-ui-components)
+- [@official@Angular a11y overview](https://material.angular.io/cdk/a11y/overview)