Fix bugs and typo errors in closest_pair_of_points.py

[Roy027]

Describe your change:

• Add an algorithm?
• Fix a bug or typo in an existing algorithm?
• Add or change doctests?
• Documentation change?

Description:
This PR refactors the closest_pair_of_points.py algorithm to improve reliability, type safety, and readability.

Key Changes:

• Bug Fix: Corrected the comparison logic in dis_between_closest_in_strip to ensure all relevant points in the strip
  are checked correctly.
• Type Hints: Added comprehensive Python type annotations (list[Any], tuple[Any, ...], int, float) to all function
  signatures for better IDE support and type safety.
• Formatting: Refactored the code to comply with ruff standards, specifically wrapping long lines (E501) and ensuring
  consistent spacing.
• Doctest Updates: Updated existing doctests to match the function outputs and added new test cases to verify the
  fixes.
• Typo Fixes: Corrected minor spelling errors in the module's docstring and comments.

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Checklist:

• x] I have read [CONTRIBUTING.md (https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md).
• This pull request is all my own work -- I have not plagiarized.
• I know that pull requests will not be merged if they fail the automated tests.
• This PR only changes one algorithm file.
• All new Python files are placed inside an existing directory.
• All filenames are in all lowercase characters with no spaces or dashes.
• All functions and variable names follow Python naming conventions.
• x] All function parameters and return values are annotated with Python [type hints
  (https://docs.python.org/3/library/typing.html).
• x] All functions have [doctests
  (https://docs.github.com/en/issues/tracking-your-work-with-issues/linking-a-pull-request-to-an-issue) that pass the
  automated testing.
• x] All new algorithms include at least one URL that points to Wikipedia or another similar explanation. (Algorithm
  explanation: [Wikipedia - Closest pair of points problem
  (https://en.wikipedia.org/wiki/Closest_pair_of_points_problem))
• ] If this pull request resolves one or more open issues then the description above includes the issue number(s)
  with a [closing keyword
  (https://docs.github.com/en/issues/tracking-your-work-with-issues/linking-a-pull-request-to-an-issue): "Fixes
  #ISSUE-NUMBER".