Add script for custom tsp update

sdk/devcenter/azure-developer-devcenter/sdk-generation.ps1

@@ -0,0 +1,8 @@
+Write-Host "TypeSpec Sync files"
+ECHO 'y' | tsp-client sync
+
+Write-Host "Update python client"
+Move-item -Path 'TempTypeSpecFiles\DevCenter\python-client.tsp' -destination 'TempTypeSpecFiles\DevCenter\client.tsp' -Force
+
+Write-Host "TypeSpec Generate"
+ECHO 'y' | tsp-client generate