TODO : Implement Unified Address Object for Multi-Type Address Support

[JAGADISHSUNILPEDNEKAR]

Unified Address Object Implementation

This PR introduces a new UnifiedAddress class that provides a unified way to handle all Bitcoin address types (P2PKH, P2SH, P2WPKH, P2WSH, P2TR) and enables conversion between compatible address types.

Changes:

• Created a new address.py module with the UnifiedAddress class
• Added support for detecting address types automatically
• Implemented conversion logic between compatible address formats
• Added functionality to create addresses from various sources (strings, hashes, scripts, witness programs)
• Added comprehensive tests for all address functionality

Key Features:

• Simplified API for handling different address types uniformly
• Easy conversion between address formats (e.g., P2PKH → P2WPKH)
• Support for nested SegWit addresses (P2SH-P2WPKH, P2SH-P2WSH)
• Complete type-hinting for better development experience
• Comprehensive validation of address formats and conversions

Example Usage:

# Create from existing addresses
unified = UnifiedAddress(p2pkh_address)

# Convert between address types
p2wpkh = unified.to_address_type(P2WPKH_ADDRESS_V0)

# Create from address string with auto-detection
address = UnifiedAddress.from_address("tb1qw508d6qejxtdg4y5r3zarvary0c5xw7kxpjzsx")

All the tests pass

[JAGADISHSUNILPEDNEKAR]

HI @karask Just checking on this PR

[karask]

Not sure that a unified object is required. The TODO mentions that but it was meant to generalise the existing Address object and see how to clean it up. I feel like this change adds more complexity for the user.

I will keep it here and re-examine it later. Thanks for the contribution.