Support formatting angular syntax in markdown (#18519)

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

@@ -0,0 +1,16 @@
+```angular-ts
+        Ugly:string
+}
+
+@Component({template: `
+@if (orderForm.couponCode().disabled()) {
+      <div class="info">
+        @for (reason of orderForm.couponCode().disabledReasons(); track reason) {
+<p>{{ reason.message }}</p>
+        }</div>
+    }
+  `
+})
+export class Order {
+}
+```