[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/peertube.py

@@ -13,7 +13,7 @@ from dateutil.relativedelta import relativedelta
 
 import babel
 
-from searx import network
+from searx.network import get  # see https://github.com/searxng/searxng/issues/762
 from searx.locales import language_tag
 from searx.utils import html_to_text
 from searx.enginelib.traits import EngineTraits
@@ -147,32 +147,30 @@ def fetch_traits(engine_traits: EngineTraits):
        https://framagit.org/framasoft/peertube/search-index/-/commit/8ed5c729#3d8747f9a60695c367c70bb64efba8f403721fad_0_291
     """
 
-    resp = network.get(
+    resp = get(
         'https://framagit.org/framasoft/peertube/search-index/-/raw/master/client/src/components/Filters.vue',
         # the response from search-index repository is very slow
         timeout=60,
     )
 
-    if not resp.ok:
+    if not resp.ok:  # type: ignore
         print("ERROR: response from peertube is not OK.")
         return
 
-    js_lang = re.search(r"videoLanguages \(\)[^\n]+(.*?)\]", resp.text, re.DOTALL)
+    js_lang = re.search(r"videoLanguages \(\)[^\n]+(.*?)\]", resp.text, re.DOTALL)  # type: ignore
     if not js_lang:
         print("ERROR: can't determine languages from peertube")
         return
 
     for lang in re.finditer(r"\{ id: '([a-z]+)', label:", js_lang.group(1)):
+        eng_tag = lang.group(1)
+        if eng_tag == 'oc':
+            # Occitanis not known by babel, its closest relative is Catalan
+            # but 'ca' is already in the list of engine_traits.languages -->
+            # 'oc' will be ignored.
+            continue
         try:
-            eng_tag = lang.group(1)
-            if eng_tag == 'oc':
-                # Occitanis not known by babel, its closest relative is Catalan
-                # but 'ca' is already in the list of engine_traits.languages -->
-                # 'oc' will be ignored.
-                continue
-
             sxng_tag = language_tag(babel.Locale.parse(eng_tag))
-
         except babel.UnknownLocaleError:
             print("ERROR: %s is unknown by babel" % eng_tag)
             continue