feat: add json value converters

[dongchangYoo]

We want to receive intermediate data for verifying the process of generating a proof as a JSON file. Therefore, in this PR, RapidJsonValueConverters for the following four classes was implemented.

• PrimeFieldBase
• Extension Fields
• Elliptic Curve Points (only short weierstrass)
• Geometric Points
• UnivariatePolynomial (sparse, dense and their coefficients)
• UnivariateEvaluations

[chokobole]

You need to move all the Copyable implementations of points in d5e33cfc7557117cc23a0b16eda1fa8c653321a9. Commit body should be corrected accordingly.

[chokobole]

1a02e54ee0c78e9c77e8ea7ea84825dfae229200 only works when it's a DenseUnivariatePolynomial. Please write codes as we do with Copyable.

[chokobole]

Please add unittests in 1a02e54ee0c78e9c77e8ea7ea84825dfae229200 .

[chokobole]

Some of changes in c8605d1485847ad9a3b4aa02f3936255da799de9 should be squashed.

[dongchangYoo]

Please add unittests in 1a02e54 .

The unittest is implemented at univariate_dense_polynomial_unittest.cc.

[chokobole]

Please could you add unittests for Fp3 and Fp4 for c2c0d5778363bd1c32b57c213ee0a79b446b7012 ?

[dongchangYoo]

Please could you add unittests for Fp3 and Fp4 for c2c0d57 ?

Currently, There is no implementations of Fp3 and Fp4.

[fakedev9999]

@dongchangYoo With f070c8b, I have 2 comments

1. Is is a feat commit? I think it's a fix commit
2. a -> an

[dongchangYoo]

@dongchangYoo With f070c8b, I have 2 comments

1. Is is a feat commit? I think it's a fix commit
2. a -> an

The implementation has been modified to copy the input string by adding an allocator as an input. This change in handling strings, I believe, qualifies as a 'feat'.