Add initial components to proto message field

src/app/editor/editor.component.html

@@ -1,3 +1,10 @@
-<!-- <div>@for (item of items; track $index) {} @switch () {}</div> -->
+<div>
+  @for (item of selectedMessage().values; track $index) {
+  <app-proto-field
+    [configuration]="item.configuration"
+    [(value)]="values()[$index]"
+  ></app-proto-field>
+  }
+</div>
 
 <pre><code class="language-json" #code>{{fileContents()}}</code></pre>