As a refactor, I'd like to suggest splitting functions in the file bn254/curves.rs into bn254/curves_g1.rs and bn254/curves_g2.rs each of which should include their respective methods -- both affine and projective.

Additionally, a lot of the core point operation functions that one may expect as implementations of these structs have been lumped together inside in utils.rs. For example,

• hinted_affine_double_line
• hinted_affine_add_line
• hinted_check_tangent_line
• hinted_check_chord_line, etc.

A clearer separation might help navigate codebase down the line.