refactor/internal (#1216)

* refactor: update import paths in gateway handlers

* refactor: remove obsolete devtools Makefile and README

* build: optimize build process for improved efficiency

* refactor: remove obsolete pkl files related to Matrix and Sonr network configurations

* refactor: move embed code to x/dwn/types

crypto/internal/point.go

@@ -1,44 +0,0 @@
-//
-// Copyright Coinbase, Inc. All Rights Reserved.
-//
-// SPDX-License-Identifier: Apache-2.0
-//
-
-package internal
-
-import (
-	"crypto/elliptic"
-	"math/big"
-
-	"filippo.io/edwards25519"
-)
-
-func CalcFieldSize(curve elliptic.Curve) int {
-	bits := curve.Params().BitSize
-	return (bits + 7) / 8
-}
-
-func ReverseScalarBytes(inBytes []byte) []byte {
-	outBytes := make([]byte, len(inBytes))
-
-	for i, j := 0, len(inBytes)-1; j >= 0; i, j = i+1, j-1 {
-		outBytes[i] = inBytes[j]
-	}
-
-	return outBytes
-}
-
-func BigInt2Ed25519Point(y *big.Int) (*edwards25519.Point, error) {
-	b := y.Bytes()
-	var arr [32]byte
-	copy(arr[32-len(b):], b)
-	return edwards25519.NewIdentityPoint().SetBytes(arr[:])
-}
-
-func BigInt2Ed25519Scalar(x *big.Int) (*edwards25519.Scalar, error) {
-	// big.Int is big endian; ed25519 assumes little endian encoding
-	kBytes := ReverseScalarBytes(x.Bytes())
-	var arr [32]byte
-	copy(arr[:], kBytes)
-	return edwards25519.NewScalar().SetCanonicalBytes(arr[:])
-}