bn254 sqrt and decompression

[nicole-graus]

BN254 Curve sqrt and decompression

Description

Add a square root function for quadratic extension and a point decompression function for the BN254 Curve. We left some TODOs because we need to check why we always have to set sqrt_qfe input to 0 for tests to pass.

Type of change

• New feature

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 93.91892% with 27 lines in your changes missing coverage. Please review.

Project coverage is 73.03%. Comparing base (28e2cdd) to head (4193540).

Files with missing lines	Patch %	Lines
...rve/short_weierstrass/curves/bn_254/compression.rs	96.02%	11 Missing ⚠️
...ptic_curve/short_weierstrass/curves/bn_254/sqrt.rs	92.71%	11 Missing ⚠️
...tic_curve/short_weierstrass/curves/bn_254/curve.rs	0.00%	3 Missing ⚠️
.../short_weierstrass/curves/bls12_381/compression.rs	77.77%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #905      +/-   ##
==========================================
+ Coverage   72.72%   73.03%   +0.30%     
==========================================
  Files         150      152       +2     
  Lines       34498    34936     +438     
==========================================
+ Hits        25090    25514     +424     
- Misses       9408     9422      +14     

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[diegokingston]

Select the root in the sqrt_qfe function accordingly.