add prototyp.BigInt#SetUint64 and #SetBigInt, and upgrade gnark dep

Author: pkieltyka

go.mod

@@ -27,7 +27,7 @@ require (
 	github.com/btcsuite/btcd/btcec/v2 v2.3.5 // indirect
 	github.com/btcsuite/btcd/btcutil v1.1.6 // indirect
 	github.com/btcsuite/btcd/chaincfg/chainhash v1.1.0 // indirect
-	github.com/consensys/gnark-crypto v0.19.1 // indirect
+	github.com/consensys/gnark-crypto v0.19.2 // indirect
 	github.com/crate-crypto/go-eth-kzg v1.4.0 // indirect
 	github.com/crate-crypto/go-ipa v0.0.0-20240724233137-53bbb0ceb27a // indirect
 	github.com/deckarep/golang-set/v2 v2.8.0 // indirect

go.sum

@@ -179,6 +179,18 @@ func (b BigInt) Cmp(n *big.Int) int {
 	return bp.Cmp(n)
 }
 
+func (b BigInt) SetUint64(n uint64) BigInt {
+	bp := (*big.Int)(&b)
+	bp.SetUint64(n)
+	return b
+}
+
+func (b BigInt) SetBigInt(n *big.Int) BigInt {
+	bp := (*big.Int)(&b)
+	bp.Set(n)
+	return b
+}
+
 var (
 	_bi                            = BigInt{}
 	_   encoding.BinaryMarshaler   = _bi