[mod] Add engine for Emojipedia

Emojipedia is an emoji reference website which documents the meaning and
common usage of emoji characters in the Unicode Standard.  It is owned by Zedge
since 2021. Emojipedia is a voting member of The Unicode Consortium.[1]

Cherry picked from @james-still [2[3] and slightly modified to fit SearXNG's
quality gates.

[1] https://en.wikipedia.org/wiki/Emojipedia
[2] obfuscated-loop/searx@2fc01eb
[3] searx/searx#3278

searx/engines/emojipedia.py

@@ -0,0 +1,67 @@
+# SPDX-License-Identifier: AGPL-3.0-or-later
+# lint: pylint
+"""Emojipedia
+
+Emojipedia is an emoji reference website which documents the meaning and
+common usage of emoji characters in the Unicode Standard.  It is owned by Zedge
+since 2021. Emojipedia is a voting member of The Unicode Consortium.[1]
+
+[1] https://en.wikipedia.org/wiki/Emojipedia
+"""
+
+from urllib.parse import urlencode
+from lxml import html
+
+from searx.utils import (
+    eval_xpath_list,
+    eval_xpath_getindex,
+    extract_text,
+)
+
+about = {
+    "website": 'https://emojipedia.org',
+    "wikidata_id": 'Q22908129',
+    "official_api_documentation": None,
+    "use_official_api": False,
+    "require_api_key": False,
+    "results": 'HTML',
+}
+
+categories = []
+paging = False
+time_range_support = False
+
+base_url = 'https://emojipedia.org'
+search_url = base_url + '/search/?{query}'
+
+
+def request(query, params):
+    params['url'] = search_url.format(
+        query=urlencode({'q': query}),
+    )
+    return params
+
+
+def response(resp):
+    results = []
+
+    dom = html.fromstring(resp.text)
+
+    for result in eval_xpath_list(dom, "/html/body/div[2]/div[1]/ol/li"):
+
+        extracted_desc = extract_text(eval_xpath_getindex(result, './/p', 0))
+
+        if 'No results found.' in extracted_desc:
+            break
+
+        link = eval_xpath_getindex(result, './/h2/a', 0)
+
+        url = base_url + link.attrib.get('href')
+        title = extract_text(link)
+        content = extracted_desc
+
+        res = {'url': url, 'title': title, 'content': content}
+
+        results.append(res)
+
+    return results

searx/settings.yml

@@ -542,6 +542,12 @@ engines:
     timeout: 3.0
     disabled: true
 
+  - name: emojipedia
+    engine: emojipedia
+    timeout: 4.0
+    shortcut: em
+    disabled: true
+
   - name: tineye
     engine: tineye
     shortcut: tin