chore: add Dart/windows-only example project

examples/dart/cli_windows/pubspec.yaml

@@ -0,0 +1,18 @@
+name: cli_windows
+description: A sample command-line application with basic argument parsing.
+version: 0.0.1
+# repository: https://github.com/my_org/my_repo
+
+environment:
+  sdk: ^3.6.0-326.0.dev
+
+# Add regular dependencies here.
+dependencies:
+  args: ^2.5.0
+  thermion_dart:
+    path: F:\Projects\thermion\thermion_dart
+  ffi: ^2.1.3
+
+dev_dependencies:
+  lints: ^5.0.0
+  test: ^1.24.0