[mod] comprehensive revision of the searxng_extra/update/ scripts

- pylint all scripts
- fix some errors reported by pyright
- from searx.data import data_dir (Path.open)
- fix import from pygments.formatters.html

NOTE: none functional changes!

Signed-off-by: Markus Heiser <markus.heiser@darmarit.de>

searxng_extra/update/update_engine_traits.py

@@ -144,9 +144,9 @@ def write_languages_file(sxng_tag_list):
 
         item = (
             sxng_tag,
-            sxng_locale.get_language_name().title(),
+            sxng_locale.get_language_name().title(),  # type: ignore
             sxng_locale.get_territory_name() or '',
-            sxng_locale.english_name.split(' (')[0],
+            sxng_locale.english_name.split(' (')[0] if sxng_locale.english_name else '',
             UnicodeEscape(flag),
         )
 
@@ -154,7 +154,7 @@ def write_languages_file(sxng_tag_list):
 
     language_codes = tuple(language_codes)
 
-    with open(languages_file, 'w', encoding='utf-8') as new_file:
+    with languages_file.open('w', encoding='utf-8') as new_file:
         file_content = "{header} {language_codes}{footer}".format(
             header=languages_file_header,
             language_codes=pformat(language_codes, width=120, indent=4)[1:-1],