Merge model,cli,docs polish for v0.1.0

# Conflicts:
#	internal/cli/commands_image.go

internal/cli/commands_vm.go

@@ -891,7 +891,8 @@ Pipe into 'jq' for quick field extraction, e.g. banger vm stats dev | jq .mem.
 }
 
 func (d *deps) newVMPortsCommand() *cobra.Command {
-	return &cobra.Command{
+	var jsonOut bool
+	cmd := &cobra.Command{
 		Use:               "ports <id-or-name>",
 		Short:             "Show host-reachable listening guest ports",
 		Args:              exactArgsUsage(1, "usage: banger vm ports <id-or-name>"),
@@ -905,9 +906,14 @@ func (d *deps) newVMPortsCommand() *cobra.Command {
 			if err != nil {
 				return err
 			}
+			if jsonOut {
+				return printJSON(cmd.OutOrStdout(), result)
+			}
 			return printVMPortsTable(cmd.OutOrStdout(), result)
 		},
 	}
+	cmd.Flags().BoolVar(&jsonOut, "json", false, "print ports as JSON instead of a table")
+	return cmd
 }
 
 type resolvedVMTarget struct {