feat: create user command

cmd/user/user.go

@@ -0,0 +1,17 @@
+package cmd
+
+import (
+	"tinyauth/cmd/user/subcommands"
+
+	"github.com/spf13/cobra"
+)
+
+func UserCmd() *cobra.Command {
+	userCmd := &cobra.Command{
+		Use:  "user",
+		Short: "User utilities",
+		Long: `Utilities for creating and verifying tinyauth compatible users.`,
+	}
+	userCmd.AddCommand(subcommands.CreateCmd)
+	return userCmd
+}