[mod] engines: migrate to setup() from init() for simple tasks

searx/engines/wolframalpha_noapi.py

@@ -3,7 +3,7 @@
 Wolfram|Alpha (Science)
 """
 
-
+import typing as t
 from json import loads
 from urllib.parse import urlencode
 
@@ -51,7 +51,7 @@ CACHE: EngineCache
 seconds."""
 
 
-def init(engine_settings):
+def setup(engine_settings: dict[str, t.Any]) -> bool | None:
     global CACHE  # pylint: disable=global-statement
     CACHE = EngineCache(engine_settings["name"])  # type:ignore