add hex string test & encode option

[sh-cha]

Summary by CodeRabbit

• New Features
  • Added constants for hex values and new functions for encoding and decoding hex strings.
  • Introduced validation functions for hex strings and characters.
• Bug Fixes
  • Improved error handling for invalid hex strings.
  • Enhanced character encoding and decoding functions.
• Tests
  • Added tests to cover error scenarios.

[coderabbitai]

Sure, I can help with that! Let's start with the requested sections:

Walkthrough

The changes in the hex.move module introduce enhancements such as new constants for hex values, improved encoding and decoding functions, error handling for invalid hex strings, and the addition of validation functions. These modifications aim to bolster functionality and error resilience within the module.

Changes

File	Summary
precompile/modules/initia_stdlib/sources/hex.move	Addition of constants for hex values, new encoding function, enhanced error handling, improved decoding logic, validation functions, and added tests for error scenarios.

Poem

In the land of code and byte,
The rabbit danced with delight,
Hex values now shine so bright,
Errors caught in the dead of night,
Enhancements bring joy, oh what a sight! 🐇✨

Note

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Commits

Files that changed from the base of the PR and between 3f766d8 and 52c79c8.

Files ignored due to path filters (2)

• api/libcompiler.dylib is excluded by !**/*.dylib
• api/libmovevm.dylib is excluded by !**/*.dylib

Files selected for processing (2)

• precompile/modules/initia_stdlib/sources/hex.move (5 hunks)
• precompile/modules/minitia_stdlib/sources/hex.move (5 hunks)

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[beer-1]

LGTM