Add syncback scripts

syncback.ps1

@@ -0,0 +1,30 @@
+#Requires -Version 5.1
+
+$ProjectRbxl = "Project.rbxl"
+$ProjectJsonFile = "default.project.json"
+
+# Load .env file
+Get-Content ".env" | ForEach-Object {
+  if ($_ -match "^\s*([^#][^=]+)=(.*)$") {
+    Set-Variable -Name $Matches[1].Trim() -Value $Matches[2].Trim() -Scope Script
+  }
+}
+
+$ProjectJson = Get-Content $ProjectJsonFile | ConvertFrom-Json
+$PlaceId = $ProjectJson.servePlaceIds[0]
+Write-Host "PlaceId: $PlaceId"
+
+# Download rbxl from Roblox
+$Url = "https://assetdelivery.roblox.com/v1/asset/?id=$PlaceId"
+$Session = New-Object Microsoft.PowerShell.Commands.WebRequestSession
+$Cookie = New-Object System.Net.Cookie(".ROBLOSECURITY", $ROBLOSECURITY, "/", ".roblox.com")
+$Session.Cookies.Add($Cookie)
+
+Write-Host "Downloading $Url..."
+Invoke-WebRequest -Uri $Url -WebSession $Session -OutFile $ProjectRbxl
+
+if ($args.Count -eq 0) {
+  rojo syncback --non-interactive --input $ProjectRbxl $ProjectJsonFile
+} else {
+  rojo syncback @args --input $ProjectRbxl $ProjectJsonFile
+}