Add BundledAssetFileServer for bundled /wails/runtime.js. Update examples.

v3/examples/binding/assets/index.html

@@ -80,7 +80,7 @@
     <input autofocus autocomplete="off" class="input" id="name" type="text"/>
     <button class="btn" onclick="greet()">Greet</button>
 </div>
-<script src='runtime.js'></script>
+<script src='/wails/runtime.js'></script>
 <script src='bindings_main.js'></script>
 <script>
   let resultText = "";

v3/examples/binding/main.go

@@ -17,7 +17,7 @@ func main() {
 			&GreetService{},
 		},
 		Assets: application.AssetOptions{
-			Handler: application.AssetFileServerFS(assets),
+			Handler: application.BundledAssetFileServer(assets),
 		},
 		Mac: application.MacOptions{
 			ApplicationShouldTerminateAfterLastWindowClosed: true,