Feature/bip32 key derivation

[ALiberalVoluntarist]

Pull Request: BIP32 and BIP44 Key Derivation Refinements
Description
This pull request improves the HD wallet key derivation interface by:

Adding a clearer BIP32 derivation path interface
Enhancing error messages for hardened key derivation from xpub
Creating dedicated BIP32 and BIP44 functions with proper naming conventions
Adding comprehensive unit tests for key derivation consistency
Maintaining backward compatibility with deprecated functions

Changes

Added BIP32_DERIVATION_PATH environment variable
Refined error messages for hardened derivation attempts from xpub keys
Implemented dedicated BIP32 derivation functions with clearer interfaces
Added BIP44-specific functions that build on the BIP32 foundation
Created comprehensive tests to ensure derivation consistency across methods
Marked legacy functions as deprecated while maintaining compatibility

Testing
The changes have been tested with:

Unit tests for derivation consistency between BIP32 and BIP44
Tests for proper error handling with invalid inputs
Backward compatibility tests with existing code

These improvements make the HD wallet functionality more robust and user-friendly while maintaining compatibility with existing code that might rely on the previous interface.

Checklist:

• [ x] I have performed a self-review of my own code
• [x ] I have made corresponding changes to the documentation
• [x ] My changes generate no new warnings
• [ x] I have updated CHANGELOG.md with my changes
• [ x] I have run the linter

[voyager1708]

The overall code quality is high, with clear variable names and logical structuring. The use of type hints and docstrings is consistent and helpful.