Restructure into modules to enable persistent disk

modules/persistent/main.tf

@@ -0,0 +1,17 @@
+resource "azurerm_resource_group" "rg" {
+  name     = "${var.prefix}-persistent-rg"
+  location = var.location
+}
+
+resource "azurerm_managed_disk" "data_disk" {
+  name                 = "${var.prefix}-winvm-datadisk"
+  location             = var.location
+  resource_group_name  = azurerm_resource_group.rg.name
+  storage_account_type = "Premium_LRS"
+  create_option        = "Empty"
+  disk_size_gb         = var.datadisk_size_gb
+
+  lifecycle {
+    prevent_destroy = true
+  }
+}