Change Unix commands to Windows commands

build_windows.bat

@@ -14,21 +14,21 @@ if %1 == portable (
 )
 
 msbuild -maxcpucount sioyek.vcxproj /property:Configuration=Release
-rm -r sioyek-release-windows 2> NUL
+rmdir /S sioyek-release-windows
 mkdir sioyek-release-windows
-cp release\sioyek.exe sioyek-release-windows\sioyek.exe
-cp pdf_viewer\keys.config sioyek-release-windows\keys.config
-cp pdf_viewer\prefs.config sioyek-release-windows\prefs.config
-cp -r pdf_viewer\shaders sioyek-release-windows\shaders
-cp tutorial.pdf sioyek-release-windows\tutorial.pdf
+copy release\sioyek.exe sioyek-release-windows\sioyek.exe
+copy pdf_viewer\keys.config sioyek-release-windows\keys.config
+copy pdf_viewer\prefs.config sioyek-release-windows\prefs.config
+xcopy /E /I pdf_viewer\shaders sioyek-release-windows\shaders\
+copy tutorial.pdf sioyek-release-windows\tutorial.pdf
 windeployqt sioyek-release-windows\sioyek.exe
-cp windows_runtime\vcruntime140_1.dll sioyek-release-windows\vcruntime140_1.dll
-cp windows_runtime\libssl-1_1-x64.dll sioyek-release-windows\libssl-1_1-x64.dll
-cp windows_runtime\libcrypto-1_1-x64.dll sioyek-release-windows\libcrypto-1_1-x64.dll
+copy windows_runtime\vcruntime140_1.dll sioyek-release-windows\vcruntime140_1.dll
+copy windows_runtime\libssl-1_1-x64.dll sioyek-release-windows\libssl-1_1-x64.dll
+copy windows_runtime\libcrypto-1_1-x64.dll sioyek-release-windows\libcrypto-1_1-x64.dll
 
 if %1 == portable (
-    cp pdf_viewer\keys_user.config sioyek-release-windows\keys_user.config
-    cp pdf_viewer\prefs_user.config sioyek-release-windows\prefs_user.config
+    copy pdf_viewer\keys_user.config sioyek-release-windows\keys_user.config
+    copy pdf_viewer\prefs_user.config sioyek-release-windows\prefs_user.config
     7z a sioyek-release-windows-portable.zip sioyek-release-windows
 
 ) else (