update docs: theme, text embeddings, used-by

[tonyyanga]

Epsilla has a new cloud offering with a free tier. This PR mentions the cloud offering as an alternative way to running a docker container locally, which can be a big ask for some users.

A few other changes are explained in-line.

To see the updated version: https://trafilatura-epsilla.readthedocs.io/en/latest/tutorial-epsilla.html

[tonyyanga]

I have no idea why the CI tests are failing. They seem to suggest there are issues with the test_dates test case. It seems unrelated to the documentation updates.

[tonyyanga]

@adbar

Looks like when htmldate is updated to 1.6.0, there are some behavior changes that impacted trafilatura tests. In this PR, I have bumped the required version for htmldate and updated the test cases for the new behavior.

See this colab notebook that demonstrates the changes in behavior: https://colab.research.google.com/drive/1UHiBcDlWt15qYlMZ6UKZG5ANs7ZRP0A0?usp=sharing

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (6f66414) 96.90% compared to head (1c9a1b8) 96.90%.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #447   +/-   ##
=======================================
  Coverage   96.90%   96.90%           
=======================================
  Files          22       22           
  Lines        3363     3363           
=======================================
  Hits         3259     3259           
  Misses        104      104           

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[adbar]

Hi @tonyyanga, thanks for the changes, my remarks are above.

The change in htmldate is also tackled in #444 but I haven't merged it yet.

[tonyyanga]

Thanks for calling out the typos! Pushed a change to fix them.