v0.7.3

Fixed

• Sign Extension Not Performed in From<i32/i64>, Cast, and TryCast for Signed Integers #52.

Internal

• Refactored integer conversion implementation for better code organization and maintainability.
• Simplified signed integer conversion methods by removing redundant intermediate logic.
• Improved macro handling for literal construction to properly support token concatenation.
• Reorganized test infrastructure with macro-based test generation for comprehensive coverage of integer conversions across different bit widths (64/128/256/512).
• Consolidated test structure by moving conversion tests into dedicated modules with automatic test generation for all supported integer types.