Batch file to clean Windows build dir

windows-clean.bat

@@ -0,0 +1,9 @@
+DEL "ZeroTier One.msi"
+DEL zt1_update*.exe
+RMDIR /Q /S windows\Build
+RMDIR /Q /S windows\copyutil\bin
+RMDIR /Q /S windows\copyutil\obj
+RMDIR /Q /S windows\WinUI\bin
+RMDIR /Q /S windows\WinUI\obj
+RMDIR /Q /S windows\ZeroTierOne\Release
+RMDIR /Q /S windows\ZeroTierOne\x64