[feat] engines: add Naver engine (#4573)

Refactor Naver engine (Web, News, Images, Videos, Autocomplete)

- ref: https://search.naver.com/
- lang: `ko`
- Wikidata: https://www.wikidata.org/wiki/Q485639

Co-authored-by: Bnyro <bnyro@tutanota.com>

searx/utils.py

@@ -830,6 +830,11 @@ def js_variable_to_python(js_variable):
     s = _JS_DECIMAL_RE.sub(":0.", s)
     # replace the surogate character by colon
     s = s.replace(chr(1), ':')
+    # replace single-quote followed by comma with double-quote and comma
+    # {"a": "\"12\"',"b": "13"}
+    # becomes
+    # {"a": "\"12\"","b": "13"}
+    s = s.replace("',", "\",")
     # load the JSON and return the result
     return json.loads(s)