Added LRU caching of converted prompt-toolkit styles and colors.

[kmvanbrunt]

No description provided.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 99.52%. Comparing base (5e3c8de) to head (bd347a3).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1657   +/-   ##
=======================================
  Coverage   99.52%   99.52%           
=======================================
  Files          21       21           
  Lines        4810     4813    +3     
=======================================
+ Hits         4787     4790    +3     
  Misses         23       23           

Flag	Coverage Δ
unittests	99.52% <100.00%> (+<0.01%)	⬆️

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[tleonhardt]

In general I love the couple places you added an @lru_cache and think that is a very smart idea.

However, I strongly prefer the callback approach in the couple places it was used versus the approach here. The callback approach never wastes any time calling any code to check if things changed when it doesn't need to. This approach here will still waste significant time checking when nothing has changed.

[tleonhardt]

Nice, I wasn't aware of Sytle.null()