Grant Lanham 851c0e5cc0 [fix] engine: re-implement mullvad leta integration
Re-writes the Mullvad Leta integration to work with the new breaking changes.

Mullvad Leta is a search engine proxy.  Currently Leta only offers text search
results not image, news or any other types of search result.  Leta acts as a
proxy to Google and Brave search results.

- Remove docstring comments regarding requiring the use of Mullvad VPN, which is
  no longer a hard requirement.

- configured two engines: ``mullvadleta`` (uses google) and
  ``mullvadleta brave`` (uses brave)

- since leta may not provide up-to-date search results, both search engines are
  disabled by default.

.. hint::

   Leta caches each search for up to 30 days.  For example, if you use search
   terms like ``news``, contrary to your intention you'll get very old results!

Co-authored-by: Markus Heiser <markus.heiser@darmarit.de>
Signed-off-by: Grant Lanham <contact@grantlanham.com>
2025-04-23 14:06:32 +02:00
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