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/subtle/x25519.go

@@ -1,25 +0,0 @@
-package subtle
-
-import (
-	"crypto/rand"
-
-	"golang.org/x/crypto/curve25519"
-)
-
-// GeneratePrivateKeyX25519 generates a new 32-byte private key.
-func GeneratePrivateKeyX25519() ([]byte, error) {
-	privKey := make([]byte, curve25519.ScalarSize)
-	_, err := rand.Read(privKey)
-	return privKey, err
-}
-
-// ComputeSharedSecretX25519 returns the 32-byte shared key, i.e.
-// privKey * pubValue on the curve.
-func ComputeSharedSecretX25519(privKey, pubValue []byte) ([]byte, error) {
-	return curve25519.X25519(privKey, pubValue)
-}
-
-// PublicFromPrivateX25519 computes privKey's corresponding public key.
-func PublicFromPrivateX25519(privKey []byte) ([]byte, error) {
-	return ComputeSharedSecretX25519(privKey, curve25519.Basepoint)
-}