ci: add test for Windows CMD wrapper (#289)

* ci: add test for Windows CMD wrapper

This test will fail until the CMD wrapper is fixed to call the native binary.

* fix: Windows CMD wrapper calls native binary instead of missing index.js

bin/agent-browser.cmd

@@ -1,5 +1,13 @@
 @echo off
 setlocal
 set "SCRIPT_DIR=%~dp0"
-node "%SCRIPT_DIR%..\dist\index.js" %*
-exit /b %errorlevel%
+set "BINARY=%SCRIPT_DIR%agent-browser-win32-x64.exe"
+
+if exist "%BINARY%" (
+    "%BINARY%" %*
+    exit /b %errorlevel%
+)
+
+echo Error: No binary found for win32-x64 >&2
+echo Run 'npm run build:native' to build for your platform >&2
+exit /b 1