Valkey DB

Implementation of the valkey client (valkey-py).

This implementation uses the valkey: setup from settings.yml. A valkey DB connect can be tested by:

>>> from searx import valkeydb
>>> valkeydb.initialize()
True
>>> db = valkeydb.client()
>>> db.set("foo", "bar")
True
>>> db.get("foo")
b'bar'
>>>