[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

searxng_extra/standalone_searx.py

@@ -46,6 +46,7 @@ import searx
 import searx.preferences
 import searx.query
 import searx.search
+import searx.search.models
 import searx.webadapter
 
 EngineCategoriesVar = Optional[List[str]]
@@ -53,7 +54,7 @@ EngineCategoriesVar = Optional[List[str]]
 
 def get_search_query(
     args: argparse.Namespace, engine_categories: EngineCategoriesVar = None
-) -> searx.search.SearchQuery:
+) -> searx.search.models.SearchQuery:
     """Get  search results for the query"""
     if engine_categories is None:
         engine_categories = list(searx.engines.categories.keys())
@@ -97,7 +98,7 @@ def json_serial(obj: Any) -> Any:
     raise TypeError("Type ({}) not serializable".format(type(obj)))
 
 
-def to_dict(search_query: searx.search.SearchQuery) -> Dict[str, Any]:
+def to_dict(search_query: searx.search.models.SearchQuery) -> Dict[str, Any]:
     """Get result from parsed arguments."""
     result_container = searx.search.Search(search_query).search()
     result_container_json = {