Allow script/build --install on all platforms

script/copy-folder.cmd

@@ -0,0 +1,18 @@
+@echo off
+
+set USAGE=Usage: %0 source destination
+
+if [%1] == [] (
+  echo %USAGE%
+  exit 1
+)
+if [%2] == [] (
+  echo %USAGE%
+  exit 2
+)
+
+:: rm -rf %2
+if exist %2 rmdir %2 /s /q
+
+:: cp -rf %1 %2
+(robocopy %1 %2 /e) ^& IF %ERRORLEVEL% LEQ 1 exit 0