Added ParsableValueTrait::pairTranslatableArrayItems()
Added ParsableValueTrait::pairTranslatableArrayItems()

Converts this:
```
{
    "en": [ "Item A", "Item B", "Item C", "Item D" ],
    "fr": [ "Élément A", "Élément B", "Élément C" ]
}
```

Into:
```
[
    {
        "en": "Item A",
        "fr": "Élément A",
    },
    {
        "en": "Item B",
        "fr": "Élément B",
    },
    {
        "en": "Item C",
        "fr": "Élément C",
    },
    {
        "en": "Item D",
        "fr": "",
    }
],
```

mcaskill/charcoal-support,mcaskill/charcoal-support