Support formatting angular syntax in markdown (#18519)

tests/format/markdown/code/angular/angular-html-invalid.md

@@ -0,0 +1,6 @@
+```angular-html
+        @for (reason of orderForm.couponCode().disabledReasons(); track reason) {
+<p>{{ reason.message }}</p>
+        }</div>
+    }
+```