unify aur.search method

due to specific of the AUR API in order to reduce the code we are using
own wrapper and work with it instead of direct library calls

src/ahriman/web/views/service/search.py

@@ -19,9 +19,10 @@
 #
 import aur  # type: ignore
 
-from aiohttp.web import HTTPBadRequest, Response, json_response
-from typing import Callable, Iterator
+from aiohttp.web import HTTPNotFound, Response, json_response
+from typing import Callable, List
 
+from ahriman.core.util import aur_search
 from ahriman.models.user_access import UserAccess
 from ahriman.web.views.base import BaseView
 
@@ -43,12 +44,10 @@ class SearchView(BaseView):
 
         :return: 200 with found package bases and descriptions sorted by base
         """
-        search: Iterator[str] = filter(lambda s: len(s) > 3, self.request.query.getall("for", default=[]))
-        search_string = " ".join(search)
-
-        if not search_string:
-            raise HTTPBadRequest(reason="Search string must not be empty")
-        packages = aur.search(search_string)
+        search: List[str] = self.request.query.getall("for", default=[])
+        packages = aur_search(*search)
+        if not packages:
+            raise HTTPNotFound(reason=f"No packages found for terms: {search}")
 
         comparator: Callable[[aur.Package], str] = lambda item: str(item.package_base)
         response = [