fix: initial subcmd completion

Broken by migration to v1 API.

pkg/autocomplete/autocomplete.go

@@ -40,3 +40,24 @@ func RecipeNameComplete(c *cli.Context) {
 		fmt.Println(name)
 	}
 }
+
+// SubcommandComplete completes subcommands.
+func SubcommandComplete(c *cli.Context) {
+	if c.NArg() > 0 {
+		return
+	}
+
+	subcmds := []string{
+		"app",
+		"autocomplete",
+		"catalogue",
+		"recipe",
+		"record",
+		"server",
+		"upgrade",
+	}
+
+	for _, cmd := range subcmds {
+		fmt.Println(cmd)
+	}
+}