Pull Xchacha20poly1305 code out of libsodium module

Author: webmaster128

packages/crypto/src/index.ts

@@ -3,7 +3,7 @@ export { Bip39, EnglishMnemonic } from "./bip39";
 export type { HashFunction } from "./hash";
 export { Hmac } from "./hmac";
 export { Keccak256, keccak256 } from "./keccak";
-export { Ed25519, Ed25519Keypair, xchacha20NonceLength, Xchacha20poly1305Ietf } from "./libsodium";
+export { Ed25519, Ed25519Keypair } from "./libsodium";
 export { Random } from "./random";
 export { Ripemd160, ripemd160 } from "./ripemd";
 export { type Secp256k1Keypair, Secp256k1 } from "./secp256k1";
@@ -18,3 +18,4 @@ export {
   Slip10RawIndex,
   stringToPath,
 } from "./slip10";
+export { xchacha20NonceLength, Xchacha20poly1305Ietf } from "./xchacha20poly1305";