chore: add a helpful ed25519 key generator

cmd/mkkey/main.go

@@ -0,0 +1,22 @@
+package main
+
+import (
+	"crypto/ed25519"
+	"crypto/rand"
+	"encoding/hex"
+	"fmt"
+)
+
+func main() {
+	pubkey, prvkey, err := ed25519.GenerateKey(rand.Reader)
+
+	if err != nil {
+		panic(err)
+	}
+
+	fmt.Printf(
+		"PUBLIC KEY: %s\nPRIVATE KEY: %s\n",
+		hex.EncodeToString(pubkey),
+		hex.EncodeToString(prvkey),
+	)
+}