Introduce a JSON output table mechanic

- Create JSONTable as a proxy/extension to tablewriter which can also output JSON.
- Implement machine readable output for `server list` and `recipe list`

cli/recipe/list.go

@@ -27,6 +27,7 @@ var recipeListCommand = cli.Command{
 	Aliases: []string{"ls"},
 	Flags: []cli.Flag{
 		internal.DebugFlag,
+		internal.MachineReadableFlag,
 		patternFlag,
 	},
 	Before: internal.SubCommandBefore,
@@ -66,10 +67,14 @@ var recipeListCommand = cli.Command{
 			}
 		}
 
-		table.SetCaption(true, fmt.Sprintf("total recipes: %v", len))
-
 		if table.NumLines() > 0 {
-			table.Render()
+			if internal.MachineReadable {
+				table.SetCaption(false, "")
+				table.JSONRender()
+			} else {
+				table.SetCaption(true, fmt.Sprintf("total recipes: %v", len))
+				table.Render()
+			}
 		}
 
 		return nil