Add proboctl auth commands

Add login, logout, and status commands for managing
authentication with the Probo API.

Signed-off-by: Bryan Frimin <bryan@getprobo.com>

pkg/cmd/auth/logout/logout.go

@@ -0,0 +1,92 @@
+// Copyright (c) 2026 Probo Inc <hello@getprobo.com>.
+//
+// Permission to use, copy, modify, and/or distribute this software for any
+// purpose with or without fee is hereby granted, provided that the above
+// copyright notice and this permission notice appear in all copies.
+//
+// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
+// REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+// AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
+// INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+// LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+// OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+// PERFORMANCE OF THIS SOFTWARE.
+
+package logout
+
+import (
+	"fmt"
+	"maps"
+	"slices"
+
+	"github.com/charmbracelet/huh"
+	"github.com/spf13/cobra"
+	"go.probo.inc/probo/pkg/cmd/cmdutil"
+)
+
+func NewCmdLogout(f *cmdutil.Factory) *cobra.Command {
+	var flagHost string
+
+	cmd := &cobra.Command{
+		Use:   "logout",
+		Short: "Log out of a Probo host",
+		Example: `  # Log out of the active host
+  proboctl auth logout
+
+  # Log out of a specific host
+  proboctl auth logout --hostname app.getprobo.com`,
+		RunE: func(cmd *cobra.Command, args []string) error {
+			cfg, err := f.Config()
+			if err != nil {
+				return err
+			}
+
+			if flagHost == "" {
+				host, _, err := cfg.DefaultHost()
+				if err != nil {
+					return err
+				}
+
+				hosts := slices.Sorted(maps.Keys(cfg.Hosts))
+				if len(hosts) > 1 && f.IOStreams.IsInteractive() {
+					options := make([]huh.Option[string], len(hosts))
+					for i, h := range hosts {
+						options[i] = huh.NewOption(h, h)
+					}
+					err := huh.NewSelect[string]().
+						Title("Select a host to log out of").
+						Options(options...).
+						Value(&flagHost).
+						Run()
+					if err != nil {
+						return err
+					}
+				} else {
+					flagHost = host
+				}
+			}
+
+			if _, ok := cfg.Hosts[flagHost]; !ok {
+				return fmt.Errorf("not logged in to %s", flagHost)
+			}
+
+			delete(cfg.Hosts, flagHost)
+
+			if err := cfg.Save(); err != nil {
+				return err
+			}
+
+			_, _ = fmt.Fprintf(
+				f.IOStreams.ErrOut,
+				"Logged out of %s\n",
+				flagHost,
+			)
+
+			return nil
+		},
+	}
+
+	cmd.Flags().StringVar(&flagHost, "hostname", "", "Probo hostname to log out of")
+
+	return cmd
+}