Added LU Decomposition Algorithm for matrix

[sourav-625]

• 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

❌ Patch coverage is 65.51724% with 10 lines in your changes missing coverage. Please review.
✅ Project coverage is 78.33%. Comparing base (82ff14c) to head (8ace7de).

Files with missing lines	Patch %	Lines
...java/com/thealgorithms/matrix/LUDecomposition.java	65.51%	9 Missing and 1 partial ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #6834      +/-   ##
============================================
- Coverage     78.34%   78.33%   -0.01%     
- Complexity     6645     6651       +6     
============================================
  Files           749      750       +1     
  Lines         22114    22143      +29     
  Branches       4342     4350       +8     
============================================
+ Hits          17325    17346      +21     
- Misses         4092     4100       +8     
  Partials        697      697              

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[alxkm]

Looks good. Thank you for the contribution.