feat: 🎸 Enahnce the Complex number + Test cases

[yashksaini-coder]

✅ Closes: #421

This pull request introduces a comprehensive Python package for complex number operations, including arithmetic, advanced operations, parsing, logging, error handling, and unit testing. The most important changes include the implementation of the ComplexNumber class, custom exceptions, logging configuration, utility functions, and unit tests.

Implementation of Complex Number Operations:

• pysnippets/Complex_number/complex_number.py: Added the ComplexNumber class with methods for addition, subtraction, multiplication, division, magnitude calculation, and conjugation. Included detailed logging for each operation.

Error Handling:

• pysnippets/Complex_number/exceptions.py: Added custom exceptions ComplexNumberError and DivisionByZeroError for robust error management.

Logging Configuration:

• pysnippets/Complex_number/logger_config.py: Added a function to set up logging with a specific format and level.

Utility Functions:

• pysnippets/Complex_number/utils.py: Added the parse_complex function to convert string representations of complex numbers into ComplexNumber objects, with logging and error handling.

Unit Testing:

• pysnippets/Complex_number/test_all.py: Added a test suite to run all unit tests.
• pysnippets/Complex_number/test_complex_number.py: Added unit tests for the ComplexNumber class, including tests for division and division by zero.
• pysnippets/Complex_number/test_operations.py: Added unit tests for the power function, including tests for zero and negative exponents.
• pysnippets/Complex_number/test_utils.py: Added unit tests for the parse_complex function, including tests for valid and invalid formats.

TESTING

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@UTSAVS26 kindly review this PR

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