✨ Extract some commands into kairosctl (#310)

This PR extracts the registration command into a `kairos-register`
binary of its own. The old sub command is kept so users can see a
deprecation notice and adapt for a future release when it's removed. The
version number is shared between binaries.

⚠️ I'm not entirely sure about the gorelease, and would benefit
from a couple of extra 👀 on this, thanks!

relates to kairos-io/kairos#1211

---------

Signed-off-by: Mauro Morales <mauro.morales@spectrocloud.com>
Signed-off-by: Mauro Morales <contact@mauromorales.com>
Signed-off-by: Itxaka <itxaka.garcia@spectrocloud.com>
Signed-off-by: GitHub <noreply@github.com>
Co-authored-by: Dimitris Karakasilis <dimitris@karakasilis.me>
Co-authored-by: Itxaka <itxaka.garcia@spectrocloud.com>
Co-authored-by: ci-robbot [bot] <105103991+ci-robbot@users.noreply.github.com>
Co-authored-by: mudler <mudler@users.noreply.github.com>
Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

internal/cli/role.go

@@ -0,0 +1,55 @@
+package cli
+
+import (
+	"fmt"
+
+	edgeVPNClient "github.com/mudler/edgevpn/api/client"
+	"github.com/mudler/edgevpn/api/client/service"
+	"github.com/urfave/cli/v2"
+)
+
+var RoleCMD = cli.Command{
+	Name:  "role",
+	Usage: "Set or list node roles",
+	Subcommands: []*cli.Command{
+		{
+			Flags:     networkAPI,
+			Name:      "set",
+			Usage:     "Set a node role",
+			UsageText: "kairos role set <UUID> master",
+			Description: `
+		Sets a node role propagating the setting to the network.
+
+		A role must be set prior to the node joining a network. You can retrieve a node UUID by running "kairos uuid".
+
+		Example:
+
+		$ (node A) kairos uuid
+		$ (node B) kairos role set <UUID of node A> master
+		`,
+			Action: func(c *cli.Context) error {
+				cc := service.NewClient(
+					c.String("network-id"),
+					edgeVPNClient.NewClient(edgeVPNClient.WithHost(c.String("api"))))
+				return cc.Set("role", c.Args().Get(0), c.Args().Get(1))
+			},
+		},
+		{
+			Flags:       networkAPI,
+			Name:        "list",
+			Description: "List node roles",
+			Action: func(c *cli.Context) error {
+				cc := service.NewClient(
+					c.String("network-id"),
+					edgeVPNClient.NewClient(edgeVPNClient.WithHost(c.String("api"))))
+				advertizing, _ := cc.AdvertizingNodes()
+				fmt.Println("Node\tRole")
+				for _, a := range advertizing {
+					role, _ := cc.Get("role", a)
+					fmt.Printf("%s\t%s\n", a, role)
+				}
+				return nil
+			},
+		},
+	},
+}