Added RandomizedClosestPair code and test

[Jivi-this-side]

• [x] I have read CONTRIBUTING.md.
• [x] This pull request is all my own work -- I have not plagiarized it.
• [x] All filenames are in PascalCase.
• [x] All functions and variable names follow Java naming conventions.
• [x] All new algorithms have a URL in their comments that points to Wikipedia or other similar explanations.
• [ ] All new code is formatted with clang-format -i --style=file path/to/your/file.java

Randomized Closest Pair of Points : (As per issue #6219 added this algo to repo)

The Closest Pair of Points problem finds the minimum Euclidean distance between two points in a 2D plane.

Randomized Algorithm Approach:

• Randomly shuffle the input points.

• Use a sweep-line + grid bucketing strategy to maintain only nearby points for efficient lookup.

• Continuously update the closest pair distance while sweeping from left to right.

⚡ Time Complexity

• Expected Time: O(n)

• Worst-case Time: O(n log n)

Use Cases

• Geospatial clustering

• Nearest-neighbor search

• Computational geometry in games, simulations, and robotics

Thank you!

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 91.11111% with 4 lines in your changes missing coverage. Please review.

Project coverage is 73.85%. Comparing base (ad5e496) to head (f111af6).

Files with missing lines	Patch %	Lines
...healgorithms/randomized/RandomizedClosestPair.java	91.11%	3 Missing and 1 partial :warning:

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #6224      +/-   ##
============================================
+ Coverage     73.81%   73.85%   +0.03%     
- Complexity     5311     5325      +14     
============================================
  Files           673      674       +1     
  Lines         18376    18421      +45     
  Branches       3553     3562       +9     
============================================
+ Hits          13565    13604      +39     
- Misses         4264     4267       +3     
- Partials        547      550       +3     

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[DenizAltunkapan]

So, how is it going? @Jivi-this-side

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