JSON creation keyword that adds the boolean {{value}} to the current JSON List.

Example:

| `Start JSON Object`          |         |
| `Start JSON List`            | enabled |
| `Add JSON List Boolean Item` | true    |
| `Add JSON List Boolean Item` | false   |
| `Add JSON List Boolean Item` | true    |
| `End JSON List`              |
| `End JSON Object`            |
| ${jsonString}=                 | `Create JSON String` |

{{jsonString}}:

| {
|    "enabled": [true, false, true]
| }
