enhanced humanize()

[psyuktha]

Pull Request Checklist

• 🧪 Added tests for changed code.
• 🛠️ All tests pass when run locally (run tox or make test to find out!).
• 🧹 All linting checks pass when run locally (run tox -e lint or make lint to find out!).
• 📚 Updated documentation for changed code.
• ⏩ Code is up-to-date with the master branch.

Description of Changes

This PR updates the humanize functionality in the arrow library to provide more specific relative time outputs, such as "Yesterday" and "Tomorrow," instead of the generic "a day ago" or "in a day" when the difference is exactly one day as stated in the issue #1125 . This update enhances readability and user experience by providing more natural language responses for day-to-day time differences.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 100.00%. Comparing base (403c29f) to head (cd878fb).
Report is 9 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff            @@
##            master     #1199   +/-   ##
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  Coverage   100.00%   100.00%           
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  Files           10        10           
  Lines         2324      2329    +5     
  Branches       357       359    +2     
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+ Hits          2324      2329    +5     

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[psyuktha]

@krisfremen could you review the changes?

[krisfremen]

This will unfortunately require changes and updates in all of the locales, as we can't simply hard code it to an English string without using the locales.

This breaks all other locales currently:

>>> arrow.arrow.Arrow.now().shift(days=1).humanize(locale="mk")
'Yesterday'