Fix/vlad/affine to proj

[vladfdp]

Describe the changes

This PR fixes some of the affine -> projective functions by adding a condition
If the point in affine form is zero then return the projective zero

Linked Issues

Resolves #

[jeremyfelder]

Looks good for the fix.

I don't think it is too much work to extern the from_affine function in cpp and use that directly in Rust and Go so we truly have a single implementation for this logic

[jeremyfelder]

I don't think it is too much work to extern the from_affine function in cpp and use that directly in Rust and Go so we truly have a single implementation for this logic

If we choose not to do this for the hotfix, then lets add a test case in both Rust and Go:

• Rust - https://github.com/ingonyama-zk/icicle/blob/main/wrappers/rust/icicle-core/src/tests.rs#L24
• Go
  • https://github.com/ingonyama-zk/icicle/blob/main/wrappers/golang/internal/generator/curves/templates/curve_test.go.tmpl#L38
  • https://github.com/ingonyama-zk/icicle/blob/main/wrappers/golang/internal/generator/curves/templates/curve_test.go.tmpl#L88