Feat/add article schema

[softrebel]

Add Article Schema and Logic to fetch article data as well.
Example Input:

"article": {
            "article_results": {
                "result": {
                    "content_state": {
                        "blocks": [
                            {
                                "data": {},
                                "entityRanges": [],
                                "inlineStyleRanges": [],
                                "key": "a5iqf",
                                "text": "اگه می‌خوای یه AI Agent ...",
                                "type": "unstyled"
                            },
                            {
                                "data": {},
                                "entityRanges": [],
                                "inlineStyleRanges": [],
                                "key": "ddbed",
                                "text": "هرمس Agent یه AI Agent متن‌باز قدرتمنده که ...",
                                "type": "unstyled"
                            },
                            {
                                "data": {},
                                "entityRanges": [
                                    {
                                        "key": 0,
                                        "length": 1,
                                        "offset": 0
                                    }
                                ],
                                "inlineStyleRanges": [],
                                "key": "f6tb4",
                                "text": " ",
                                "type": "atomic"
                            },
...
]}}}
}