Add wintun.ps1

scripts/deps/wintun.ps1

@@ -0,0 +1,21 @@
+param (
+    [string]
+    $OutputPath
+)
+
+try {
+    Invoke-WebRequest `
+        -Uri 'https://www.wintun.net/builds/wintun-0.13.zip' `
+        -OutFile 'wintun.zip'
+}
+catch {
+    exit 1
+}
+
+7z x 'wintun.zip'
+if ( -Not $? ) { exit $lastExitCode }
+
+mv -Force 'wintun\bin\amd64\wintun.dll' $OutputPath
+
+rm -Recurse -Force 'wintun'
+exit 0