refactor: refactor Ceil and improved tests

[alxkm]

Ceil Class Refactor:

• Simplified the Ceil.ceil(double) method for better clarity and correctness.
• Replaced (int) casting with (long) to handle edge cases and large numbers more safely.
• Updated method-level JavaDoc and added class-level documentation for better understanding and maintainability.

Test Refactor:

• Migrated CeilTest to use JUnit 5 @ParameterizedTest with @CsvSource.
• Enhanced test readability, scalability, and coverage.
• Ensures better structure and allows easier future additions of test cases.

• 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

Attention: Patch coverage is 57.14286% with 3 lines in your changes missing coverage. Please review.

Project coverage is 74.63%. Comparing base (ef93cc1) to head (cf176af).

Files with missing lines	Patch %	Lines
src/main/java/com/thealgorithms/maths/Ceil.java	57.14%	1 Missing and 2 partials ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #6366      +/-   ##
============================================
- Coverage     74.64%   74.63%   -0.02%     
- Complexity     5445     5450       +5     
============================================
  Files           682      682              
  Lines         19000    19003       +3     
  Branches       3668     3669       +1     
============================================
  Hits          14182    14182              
- Misses         4260     4261       +1     
- Partials        558      560       +2     

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[DenizAltunkapan]

Did you also test edge cases like Double.MAX_VALUE, Double.MIN_VALUE, Zero, NaN, and Infinity to ensure the method handles them correctly?

[alxkm]

Thanks, fixed it. Now everything works like Math.ceil.