Feat/metal/ec

[moven0831]

Related issue:

• Refactor Metal EC Backend #20

Key Changes:

Functionality Additions:

• Added a new jacobian_madd_2007_bl function for mixed addition of Jacobian and Affine points in jacobian.metal.
• Introduced a new test for jacobian_madd_2007_bl in jacobian_madd_2007_bl.metal.

Refactoring:

• Renamed jacobian_add_2007_bl_unsafe to jacobian_add_2007_bl for better clarity and safety. [1] [2]

Performance Improvements:

• Replaced mont_mul_optimised with mont_mul_cios in jacobian_add_2007_bl and jacobian_dbl_2009_l functions to improve multiplication performance. [1] [2]

Documentation:

• Added references to algorithm sources in jacobian.metal for better documentation and traceability. [1] [2]

Testing:

• Added comprehensive tests for jacobian_add_2007_bl and jacobian_dbl_2009_l in Rust to ensure correctness. [1] [2]