feat: Add MLAG settings

Fixes #268

examples/resources/routeros_bridge_mlag/import.sh

@@ -0,0 +1 @@
+terraform import routeros_ip_cloud.test .

examples/resources/routeros_bridge_mlag/resource.tf

@@ -0,0 +1,4 @@
+resource "routeros_bridge_mlag" "mlag" {
+  bridge    = "bridge1"
+  peer_port = "stack-link"
+}

routeros/provider.go

@@ -119,6 +119,7 @@ func Provider() *schema.Provider {
 
 			// Aliases for interface objects to retain compatibility between original and fork
 			"routeros_bridge":         ResourceInterfaceBridge(),
+			"routeros_bridge_mlag":    ResourceInterfaceBridgeMlag(),
 			"routeros_bridge_port":    ResourceInterfaceBridgePort(),
 			"routeros_bridge_vlan":    ResourceInterfaceBridgeVlan(),
 			"routeros_gre":            ResourceInterfaceGre(),

routeros/resource_interface_bridge_mlag _test.go

@@ -0,0 +1,9 @@
+package routeros
+
+import (
+	"testing"
+)
+
+func TestAccInterfaceBridgeMlagTest_basic(t *testing.T) {
+	t.Log("Test skipped, The test is skipped, the resource is only available on real hardware.")
+}

routeros/resource_interface_bridge_mlag.go

@@ -0,0 +1,47 @@
+package routeros
+
+import (
+	"github.com/hashicorp/terraform-plugin-sdk/v2/helper/schema"
+)
+
+/*
+{
+	"bridge":"bridge1",
+	"peer-port":"stack-link"
+}
+*/
+
+// https://help.mikrotik.com/docs/display/ROS/Multi-chassis+Link+Aggregation+Group
+func ResourceInterfaceBridgeMlag() *schema.Resource {
+	resSchema := map[string]*schema.Schema{
+		MetaResourcePath: PropResourcePath("/interface/bridge/mlag"),
+		MetaId:           PropId(Id),
+
+		"bridge": {
+			Type:        schema.TypeString,
+			Required:    true,
+			Description: "The bridge interface where MLAG is being created.",
+		},
+		"peer_port": {
+			Type:     schema.TypeString,
+			Required: true,
+			Description: "An interface that will be used as a peer port. Both peer devices are using inter-chassis " +
+				"communication over these peer ports to establish MLAG and update the host table. Peer port should be " +
+				"isolated on a different untagged VLAN using a pvid setting. Peer port can be configured as a bonding " +
+				"interface.",
+		},
+	}
+
+	return &schema.Resource{
+		CreateContext: DefaultSystemCreate(resSchema),
+		ReadContext:   DefaultSystemRead(resSchema),
+		UpdateContext: DefaultSystemUpdate(resSchema),
+		DeleteContext: DefaultSystemDelete(resSchema),
+
+		Importer: &schema.ResourceImporter{
+			StateContext: schema.ImportStatePassthroughContext,
+		},
+
+		Schema: resSchema,
+	}
+}