Add Temperature Conversion Utility

[krishna-medapati]

Fixes #6936

Description

Added a utility class for temperature conversions between Celsius, Fahrenheit, and Kelvin.

Implementation

• 6 conversion methods covering all unit combinations
• Follows the repository's code style and conventions
• Uses precise conversion formulas

Testing

Comprehensive test coverage including:

• Standard conversions (0°C, 100°C)
• Edge cases (-40° where F and C match)
• Body temperature (37°C / 98.6°F)
• Absolute zero

• [ 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.
• [ x] 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 78.34%. Comparing base (a008cc2) to head (97cfaa0).

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #7066      +/-   ##
============================================
+ Coverage     78.33%   78.34%   +0.01%     
- Complexity     6670     6677       +7     
============================================
  Files           753      754       +1     
  Lines         22185    22191       +6     
  Branches       4356     4356              
============================================
+ Hits          17378    17386       +8     
+ Misses         4107     4106       -1     
+ Partials        700      699       -1     

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