chore: add Dart/windows-only example project

examples/dart/cli_windows/bin/cli_windows.dart

@@ -0,0 +1,52 @@
+import 'dart:ffi';
+import 'dart:io';
+
+import 'package:ffi/ffi.dart';
+// import 'package:thermion_dart/thermion_dart/thermion_viewer_ffi.dart';
+import 'package:thermion_dart/src/utils/src/dart_resources.dart';
+import 'package:thermion_dart/src/viewer/src/ffi/src/thermion_viewer_ffi.dart';
+import 'package:thermion_dart/src/viewer/src/ffi/src/thermion_dart.g.dart';
+
+void main(List<String> arguments) async {
+  var lib = DynamicLibrary.open("thermion_windows.dll");
+  var createWindow = lib.lookupFunction<Int Function(Int width, Int height, Int left, Int top), int Function(int, int, int, int)>("create_thermion_window");
+  var update = lib.lookupFunction<Void Function(), void Function()>("update");
+  var hwnd = createWindow(500, 500, 0, 0);
+  update();
+
+  final resourceLoader = calloc<ResourceLoaderWrapper>(1);
+  
+  var loadToOut = NativeCallable<
+      Void Function(Pointer<Char>,
+          Pointer<ResourceBuffer>)>.listener(DartResourceLoader.loadResource);
+
+  resourceLoader.ref.loadToOut = loadToOut.nativeFunction;
+  var freeResource = NativeCallable<Void Function(ResourceBuffer)>.listener(
+      DartResourceLoader.freeResource);
+  resourceLoader.ref.freeResource = freeResource.nativeFunction;
+
+  var viewer = ThermionViewerFFI(
+    
+    resourceLoader: resourceLoader.cast<Void>());
+
+  await viewer.initialized;
+  var swapChain = await viewer.createSwapChain(hwnd);
+  var view = await viewer.getViewAt(0);
+  await view.updateViewport(500, 500);
+  
+  await view.setRenderable(true, swapChain);
+  
+  await viewer.setBackgroundColor(1.0, 0.0, 0.0, 1.0);
+
+  var skyboxPath = File("..\\..\\assets\\default_env_skybox.ktx").absolute;
+
+  await viewer.loadSkybox("file://${skyboxPath.uri.toFilePath(windows: true)}");
+  while(true) {
+    await viewer.render();
+    update();
+    await Future.delayed(Duration(milliseconds: 16));
+  }
+  
+
+  
+}