[feat] engine: implementation of yandex music

Access to music is limited to a few countries:

- https://yandex.com/support/music/access.html

searx/engines/yandex_music.py

@@ -0,0 +1,63 @@
+# SPDX-License-Identifier: AGPL-3.0-or-later
+# lint: pylint
+"""Yandex Music
+
+.. _Countries where Yandex.Music is available: https://yandex.com/support/music/access.html
+
+.. hint::
+
+   Access to music is limited to a few countries: `Countries where Yandex.Music
+   is available`_
+
+"""
+
+from urllib.parse import urlencode
+
+# about
+about = {
+    "website": 'https://music.yandex.ru',
+    "wikidata_id": 'Q4537983',
+    "official_api_documentation": None,
+    "use_official_api": False,
+    "require_api_key": False,
+    "results": 'JSON',
+}
+
+# engine dependent config
+categories = ['music']
+paging = True
+
+# search-url
+url = 'https://music.yandex.ru'
+search_url = url + '/handlers/music-search.jsx'
+
+# do search-request
+def request(query, params):
+    args = {'text': query, 'page': params['pageno'] - 1}
+    params['url'] = search_url + '?' + urlencode(args)
+
+    return params
+
+
+# get response from search-request
+def response(resp):
+    results = []
+    search_res = resp.json()
+
+    # parse results
+    for result in search_res.get('tracks', {}).get('items', []):
+        if result['type'] == 'music':
+            track_id = result['id']
+            album_id = result['albums'][0]['id']
+
+            # append result
+            results.append(
+                {
+                    'url': f'{url}/album/{album_id}/track/{track_id}',
+                    'title': result['title'],
+                    'content': f"[{result['albums'][0]['title']}] {result['artists'][0]['name']} - {result['title']}",
+                    'iframe_src': f'{url}/iframe/track/{track_id}/{album_id}',
+                }
+            )
+
+    return results

searx/settings.yml

@@ -1708,6 +1708,13 @@ engines:
     engine: unsplash
     shortcut: us
 
+  - name: yandex music
+    engine: yandex_music
+    shortcut: ydm
+    disabled: true
+    # https://yandex.com/support/music/access.html
+    inactive: true
+
   - name: yahoo
     engine: yahoo
     shortcut: yh