docs: add links to web.dev/angular guides (#31804)

This PR adds the following links to web.dev/angular:

1. Link to the guides in the resource section under "Online Training"
2. Links to code-splitting & preloading in the lazy-loading guide
3. Link to the accessibility guide on web.dev/angular

PR Close #31804

aio/content/guide/accessibility.md

@@ -179,3 +179,8 @@ Books
 * "A Web for Everyone: Designing Accessible User Experiences", Sarah Horton and Whitney Quesenbery
 
 * "Inclusive Design Patterns", Heydon Pickering
+
+## More on accessibility
+
+You may also be interested in the following:
+* [Audit your Angular app's accessibility with codelyzer](https://web.dev/accessible-angular-with-codelyzer/).

aio/content/guide/lazy-loading-ngmodules.md

@@ -207,3 +207,6 @@ You may also be interested in the following:
 * [Routing and Navigation](guide/router).
 * [Providers](guide/providers).
 * [Types of Feature Modules](guide/module-types).
+* [Route-level code-splitting in Angular](https://web.dev/route-level-code-splitting-in-angular/)
+* [Route preloading strategies in Angular](https://web.dev/route-preloading-in-angular/)
+

aio/content/marketing/resources.json

@@ -637,6 +637,12 @@
             "rev": true,
             "title": "Loiane Training (Português)",
             "url": "https://loiane.training/course/angular/"
+          },
+          "web-dev-angular": {
+            "desc": "Build performant and progressive Angular applications.",
+            "rev": true,
+            "title": "web.dev/angular",
+            "url": "https://web.dev/angular"
           }
         }
       },