Split CLI command stubs into separate files

Move each command function from main.go into its own file
(deploy.go, lifecycle.go, status.go, etc.) to enable parallel
development by multiple workers without file conflicts.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

cmd/mcp/lifecycle.go

@@ -0,0 +1,40 @@
+package main
+
+import (
+	"fmt"
+
+	"github.com/spf13/cobra"
+)
+
+func stopCmd() *cobra.Command {
+	return &cobra.Command{
+		Use:   "stop <service>",
+		Short: "Stop all components, set active=false",
+		Args:  cobra.ExactArgs(1),
+		RunE: func(cmd *cobra.Command, args []string) error {
+			return fmt.Errorf("not implemented")
+		},
+	}
+}
+
+func startCmd() *cobra.Command {
+	return &cobra.Command{
+		Use:   "start <service>",
+		Short: "Start all components, set active=true",
+		Args:  cobra.ExactArgs(1),
+		RunE: func(cmd *cobra.Command, args []string) error {
+			return fmt.Errorf("not implemented")
+		},
+	}
+}
+
+func restartCmd() *cobra.Command {
+	return &cobra.Command{
+		Use:   "restart <service>",
+		Short: "Restart all components",
+		Args:  cobra.ExactArgs(1),
+		RunE: func(cmd *cobra.Command, args []string) error {
+			return fmt.Errorf("not implemented")
+		},
+	}
+}