Add Pallas and Vesta fields

[mdvillagra]

Add Pallas and Vesta fields

Description

This PR add the Pallas and Vesta base fields in order to later construct the Pasta curves. There is no issue associated to this PR, but it was requested in Lambdaworks.

Type of change

• New feature

[MauroToscano]

Remove the custom serializer if possible. The one in the Starknet field existed because of a very specific requirement of the the standarized fields of Starknet, and making them work with no std. You don't even need it for wasm.

[codecov-commenter]

Codecov Report

Attention: 2 lines in your changes are missing coverage. Please review.

Comparison is base (0f3b5ef) 96.16% compared to head (f60f27e) 96.16%.

Files	Patch %	Lines
math/src/field/fields/pallas_field.rs	0.00%	1 Missing ⚠️
math/src/field/fields/vesta_field.rs	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #690      +/-   ##
==========================================
- Coverage   96.16%   96.16%   -0.01%     
==========================================
  Files         132      134       +2     
  Lines       29904    29906       +2     
==========================================
  Hits        28758    28758              
- Misses       1146     1148       +2     

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