feat(cmd): add desire-path commands for agent ergonomics

- gt hook --clear: alias for 'gt unhook' (gt-eod2iv)
- gt close: wrapper for 'bd close' (gt-msak6o)
- gt bead move: move beads between repos (gt-dzdbr7)

These commands were natural guesses that agents tried but didn't exist.
Following the desire-paths approach to improve agent ergonomics.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

internal/cmd/close.go

@@ -0,0 +1,40 @@
+package cmd
+
+import (
+	"os"
+	"os/exec"
+
+	"github.com/spf13/cobra"
+)
+
+var closeCmd = &cobra.Command{
+	Use:     "close [bead-id...]",
+	GroupID: GroupWork,
+	Short:   "Close one or more beads",
+	Long: `Close one or more beads (wrapper for 'bd close').
+
+This is a convenience command that passes through to 'bd close' with
+all arguments and flags preserved.
+
+Examples:
+  gt close gt-abc              # Close bead gt-abc
+  gt close gt-abc gt-def       # Close multiple beads
+  gt close --reason "Done"     # Close with reason
+  gt close --force             # Force close pinned beads`,
+	DisableFlagParsing: true, // Pass all flags through to bd close
+	RunE:               runClose,
+}
+
+func init() {
+	rootCmd.AddCommand(closeCmd)
+}
+
+func runClose(cmd *cobra.Command, args []string) error {
+	// Build bd close command with all args passed through
+	bdArgs := append([]string{"close"}, args...)
+	bdCmd := exec.Command("bd", bdArgs...)
+	bdCmd.Stdin = os.Stdin
+	bdCmd.Stdout = os.Stdout
+	bdCmd.Stderr = os.Stderr
+	return bdCmd.Run()
+}