Bugfix/metadata text

[wenga86]

Problem

RTE JSON links may have more than one child within them. In cases such as these the text attribute should return all child text, not just the last child's value.

Solution

Collect all text nodes and stitch their values together

Real world Examples

{
    "uid": "27a303b40d2f4e85874c15bea3a906f5",
    "type": "reference",
    "attrs": {
        "display-type": "link",
        "type": "entry",
        "class-name": "embedded-entry redactor-component block-entry",
        "entry-uid": "blt513d896103aab8a4",
        "locale": "en-us",
        "content-type-uid": "product_listing",
        "target": "_self",
        "href": "/go/l/blt513d896103aab8a4"
    },
    "children": [
        {
            "text": ""
        },
        {
            "uid": "c3b9a54551464998a64c3b4f510f61e8",
            "type": "span",
            "attrs": {},
            "children": [
                {
                    "text": "L'Oreal Paris Telescopic Lift Washable Mascara"
                }
            ]
        },
        {
            "text": ""
        }
    ]
}

Expected

"L'Oreal Paris Telescopic Lift Washable Mascara"

Received

""

{
    "uid": "2643192bee9445ee9a84c637a9d8d185",
    "type": "reference",
    "attrs": {
        "href": "/go/l/bltb4a1874571d07893",
        "data-slate-node": "element",
        "data-slate-inline": "true",
        "display-type": "link",
        "type": "entry",
        "class-name": "embedded-entry redactor-component block-entry",
        "entry-uid": "bltb4a1874571d07893",
        "locale": "en-us",
        "content-type-uid": "product_listing",
        "target": "_self",
        "data-editor-type": "scrte",
        "class": "style-module_linkRef__c1tvp",
        "data-type": "link",
        "data-testid": "embed-hyperlink"
    },
    "children": [
        {
            "text": "L'Oreal Paris Telescopic Lift "
        },
        {
            "text": "Washable",
            "italic": true
        },
        {
            "text": " Mascara"
        }
    ]
}

Expected

"L'Oreal Paris Telescopic Lift Washable Mascara"

Received

" Mascara"