[mod] addition of various type hints / tbc

- pyright configuration [1]_
- stub files: types-lxml [2]_
- addition of various type hints
- enable use of new type system features on older Python versions [3]_
- ``.tool-versions`` - set python to lowest version we support (3.10.18) [4]_:
  Older versions typically lack some typing features found in newer Python
  versions.  Therefore, for local type checking (before commit), it is necessary
  to use the older Python interpreter.

.. [1] https://docs.basedpyright.com/v1.20.0/configuration/config-files/
.. [2] https://pypi.org/project/types-lxml/
.. [3] https://typing-extensions.readthedocs.io/en/latest/#
.. [4] https://mise.jdx.dev/configuration.html#tool-versions

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

tests/unit/processors/test_online.py

@@ -1,7 +1,7 @@
 # SPDX-License-Identifier: AGPL-3.0-or-later
 # pylint: disable=missing-module-docstring,disable=missing-class-docstring,invalid-name
 
-from searx.search import SearchQuery, EngineRef
+from searx.search.models import EngineRef, SearchQuery
 from searx.search.processors import online
 from searx import engines
 

tests/unit/test_external_bangs.py

@@ -8,7 +8,7 @@ from searx.external_bang import (
     get_bang_definition_and_autocomplete,
     LEAF_KEY,
 )
-from searx.search import SearchQuery, EngineRef
+from searx.search.models import EngineRef, SearchQuery
 from tests import SearxTestCase
 
 

tests/unit/test_search.py

@@ -4,7 +4,7 @@
 from copy import copy
 
 import searx.search
-from searx.search import SearchQuery, EngineRef
+from searx.search.models import SearchQuery, EngineRef
 from searx import settings
 from tests import SearxTestCase
 

tests/unit/test_webadapter.py

@@ -5,7 +5,7 @@ import searx.plugins
 
 from searx.engines import engines
 from searx.preferences import Preferences
-from searx.search import EngineRef
+from searx.search.models import EngineRef
 from searx.webadapter import validate_engineref_list
 
 from tests import SearxTestCase