docs: replace idx with firebase studio (#1316)

Author: jdegand

README.md

@@ -615,7 +615,7 @@ become an Angular expert.
 * [StackBlitz](https://stackblitz.com) - Instant Dev Environments.
 * [bolt](https://bolt.new/) -  Dev sandbox with AI from StackBlitz.
 * [CodeSandbox](https://codesandbox.io/s/angular-angular) - An online IDE and prototyping tool for rapid Angular development.
-* [IDX](https://idx.dev/) - Project IDX is an AI-assisted workspace for full-stack, multiplatform app development in the cloud.
+* [Firebase Studio](https://firebase.studio/) - Firebase Studio accelerates your entire development lifecycle with AI agents. Build backends, front ends, and mobile apps, all in one place.
 * [ngx-html-syntax](https://github.com/princemaple/ngx-html-syntax) - Angular HTML Syntax for [SublimeText](https://www.sublimetext.com/).
 * [Bugfender](https://bugfender.com/platforms/angular-logging/) - A cloud service to collect logs and Angular errors in Real-Time.
 * [Angular Dev Tools](https://angular.dev/tools/devtools) - Angular DevTools is a browser extension that provides debugging and profiling capabilities for Angular applications.