docs(angular): add developer tools content (#6951)

src/data/roadmaps/angular/content/developer-tools@EbJib-XfZFF9bpCtL3aBs.md

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-# Developer Tools
+# Developer Tools
+
+Angular offers a suite of powerful developer tools designed to streamline and enhance the development process. These include the Angular CLI for efficient project setup and management, the Angular DevTools extension for advanced debugging and profiling, and the Angular Language Service for improved code editing and completion. Leveraging these tools will significantly improve your ability to write high-quality Angular code.
+
+Visit the following resources to learn more:
+
+- [@official@Angular Official Docs - devtools](https://angular.dev/tools/devtools)
+- [@official@Angular Official Docs - CLI](https://angular.dev/tools/cli)
+- [@official@Language Service Docs](https://angular.dev/tools/language-service)
+- [@opensource@VS Code NG Language Service](https://github.com/angular/vscode-ng-language-service)