Import Ethereum's KZG common reference string for compatibility

[seresistvanandras]

We use the following unsafe, completely insecure, common reference string for our proof of concept implementation.

fde/src/commit/kzg.rs

Lines 18 to 28 in 8759afa

	pub fn unsafe_setup(tau: C::ScalarField, range: usize) -> Self {
	let mut g1 = Vec::new();
	let mut g2 = Vec::new();
	let mut exponent = C::ScalarField::one();
	for _ in 1..=range {
	g1.push((<C::G1Affine as AffineRepr>::generator() * exponent).into_affine());
	g2.push((<C::G2Affine as AffineRepr>::generator() * exponent).into_affine());
	exponent *= tau;
	}
	Self { g1, g2 }
	}

For applications that want to be compatible with Ethereum, it will be necessary to use the common reference string of the KZG commitment created in 2023 during a large-scale KZG ceremony by the Ethereum Foundation.