Feat: add compile-time evaluation for convert, slice and extract32

[lanceherman]

Description

This PR implements compile-time evaluation for the convert, slice, and extract32 functions, improving gas efficiency and enabling optimizations. The implementation follows Vyper's pattern for compile-time evaluation while maintaining strict type safety and validation.

Changes

Convert Function

• Added _try_fold method with comprehensive validation:
• Integer range validation
• Address length validation (20 bytes)
• Bytes length validation
• Decimal truncation checks
• Proper hex prefix validation

Slice Function

• Added _try_fold method with:
• Bounds checking for start and length
• Support for bytes, string, and hex inputs
• Proper error messages for out-of-bounds access

Extract32 Function

• Added _try_fold method with:
• Proper handling of output_type kwarg
• Support for BytesM_T, IntegerT, and AddressT outputs
• Bounds checking for start index
• Correct byte alignment for address outputs

Related Issues

Solves/Fixes #2498

[lanceherman]

Hi @charles-cooper can you please check and review the PR for the issue #2498 and let me know if it needs any changes.