feat: initial library code

util/randomid/randomid.go

@@ -0,0 +1,16 @@
+package randomid
+
+import (
+	"crypto/rand"
+	"encoding/hex"
+	"fmt"
+)
+
+func Generate() (string, error) {
+	b := make([]byte, 4)
+	_, err := rand.Read(b)
+	if err != nil {
+		return "", fmt.Errorf("failed to generate random string: %w", err)
+	}
+	return hex.EncodeToString(b), nil
+}