Initial implementation of mcdeploy deployment tool

Single Go binary with five commands:
- build: podman build locally with registry tags + git version
- push: podman push to MCR
- deploy: SSH pull/stop/rm/run on target node
- cert renew: issue TLS cert from Metacrypt via REST API
- status: show container status on a node

Config-driven via TOML service registry describing images,
Dockerfiles, container configs per node. Shells out to podman
for container operations and ssh for remote access.

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

status.go

@@ -0,0 +1,34 @@
+package main
+
+import (
+	"fmt"
+
+	"github.com/spf13/cobra"
+)
+
+func statusCommand() *cobra.Command {
+	return &cobra.Command{
+		Use:   "status <node>",
+		Short: "Show container status on a node",
+		Args:  cobra.ExactArgs(1),
+		RunE: func(cmd *cobra.Command, args []string) error {
+			cfg, err := loadCfg()
+			if err != nil {
+				return err
+			}
+
+			node, err := cfg.FindNode(args[0])
+			if err != nil {
+				return err
+			}
+
+			host := node.Host
+			if node.User != "" {
+				host = node.User + "@" + node.Host
+			}
+
+			fmt.Printf("Containers on %s (%s):\n\n", args[0], node.Host)
+			return sshRun(host, "podman ps --format 'table {{.Names}}\t{{.Status}}\t{{.Image}}'")
+		},
+	}
+}