Create ColumnarTranspositionCipher.java

[smritii73]

Transposition cipher code in java

• I have read CONTRIBUTING.md.
• This pull request is all my own work -- I have not plagiarized it.
• All filenames are in PascalCase.
• All functions and variable names follow Java naming conventions.
• 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

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 72.37%. Comparing base (a163816) to head (a7ad7c8).

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #6037      +/-   ##
============================================
- Coverage     72.37%   72.37%   -0.01%     
+ Complexity     4981     4980       -1     
============================================
  Files           652      652              
  Lines         17569    17569              
  Branches       3385     3385              
============================================
- Hits          12716    12715       -1     
  Misses         4373     4373              
- Partials        480      481       +1     

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[siriak]

This is already implemented here

Java/src/main/java/com/thealgorithms/ciphers/ColumnarTranspositionCipher.java

Line 10 in a163816

public final class ColumnarTranspositionCipher {