[powershell] add menuconfig support

menuconfig.ps1

@@ -0,0 +1,18 @@
+$url = "https://github.com/Guozhanxin/env-windows/releases/download/1.0/kconfig-mconf.zip"
+$env_bin_dir = "$HOME\.env\tools\bin"
+
+if (!(Test-Path -Path $env_bin_dir)) {
+    echo 'Can not find kconfig-mconf, install now.'
+    echo 'downloading.'
+    wget -O kconfig-mconf.zip $url
+    if (!$?)
+    {
+        echo 'download failed!, exit.'
+        exit
+    }
+    mkdir $env_bin_dir | Out-Null
+    Expand-Archive -Path kconfig-mconf.zip -DestinationPath $env_bin_dir
+    echo 'install kconfig-mconf done.'
+}
+$env:path="$HOME\.env\tools\bin;$env:path"
+python $HOME/.env/tools/scripts/env.py menuconfig $args