[fix] engine & network issues / documentation and type annotations

This patch fixes some quirks and issues related to the engines and the network.
Each engine has its own network and this network was broken for the following
engines[1]:

- archlinux
- bing
- dailymotion
- duckduckgo
- google
- peertube
- startpage
- wikipedia

Since the files have been touched anyway, the type annotaions of the engine
modules has also been completed so that error messages from the type checker are
no longer reported.

Related and (partial) fixed issue:

- [1] https://github.com/searxng/searxng/issues/762#issuecomment-1605323861
- [2] https://github.com/searxng/searxng/issues/2513
- [3] https://github.com/searxng/searxng/issues/2515

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

searx/engines/dailymotion.py

@@ -18,9 +18,9 @@ from urllib.parse import urlencode
 import time
 import babel
 
-from searx.exceptions import SearxEngineAPIException
-from searx import network
+from searx.network import get, raise_for_httperror  # see https://github.com/searxng/searxng/issues/762
 from searx.utils import html_to_text
+from searx.exceptions import SearxEngineAPIException
 from searx.locales import region_tag, language_tag
 from searx.enginelib.traits import EngineTraits
 
@@ -106,7 +106,7 @@ def request(query, params):
     if not query:
         return False
 
-    eng_region = traits.get_region(params['searxng_locale'], 'en_US')
+    eng_region: str = traits.get_region(params['searxng_locale'], 'en_US')  # type: ignore
     eng_lang = traits.get_language(params['searxng_locale'], 'en')
 
     args = {
@@ -156,7 +156,7 @@ def response(resp):
     if 'error' in search_res:
         raise SearxEngineAPIException(search_res['error'].get('message'))
 
-    network.raise_for_httperror(resp)
+    raise_for_httperror(resp)
 
     # parse results
     for res in search_res.get('list', []):
@@ -218,11 +218,11 @@ def fetch_traits(engine_traits: EngineTraits):
 
     """
 
-    resp = network.get('https://api.dailymotion.com/locales')
-    if not resp.ok:
+    resp = get('https://api.dailymotion.com/locales')
+    if not resp.ok:  # type: ignore
         print("ERROR: response from dailymotion/locales is not OK.")
 
-    for item in resp.json()['list']:
+    for item in resp.json()['list']:  # type: ignore
         eng_tag = item['locale']
         if eng_tag in ('en_EN', 'ar_AA'):
             continue
@@ -241,11 +241,11 @@ def fetch_traits(engine_traits: EngineTraits):
 
     locale_lang_list = [x.split('_')[0] for x in engine_traits.regions.values()]
 
-    resp = network.get('https://api.dailymotion.com/languages')
-    if not resp.ok:
+    resp = get('https://api.dailymotion.com/languages')
+    if not resp.ok:  # type: ignore
         print("ERROR: response from dailymotion/languages is not OK.")
 
-    for item in resp.json()['list']:
+    for item in resp.json()['list']:  # type: ignore
         eng_tag = item['code']
         if eng_tag in locale_lang_list:
             sxng_tag = language_tag(babel.Locale.parse(eng_tag))