Add PS script for Windows users

Author: hentai-chan

EasyInstall.ps1

@@ -0,0 +1,28 @@
+Write-Host -ForegroundColor Yellow "+++ PKMN Asset Builder +++"
+
+Write-Host "`nAccording to the National Pok\u00e9mon Index, the first 151 entries served in Generation I."
+Write-Host "You may use any of these numbers to create new asset files to play this game.`n"
+
+$ID1 = Read-Host "Pokemon ID #1"
+$ID2 = Read-Host "Pokemon ID #2"
+
+if ( -not (Test-Path -Path "venv" -PathType Container) )
+{
+    Write-Host -ForegroundColor Yellow "Creating a new virtual environment . . ."
+    python -m venv venv/
+    .\venv\Scripts\Activate.ps1
+    Write-Host "Installing dependencies . . ."
+    python -m pip install --upgrade pip
+    python -m pip install -r requirements.txt --only-binary all
+}
+else
+{
+    .\venv\Scripts\Activate.ps1
+}
+
+python gen_data.py --verbose make --id $ID1 $ID2
+python gen_data.py manifest
+
+Write-Host -ForegroundColor Yellow "Done!"
+
+deactivate # virtual environment