Add an option to not enable WAL (should help in #399)

src/config.rs

@@ -253,6 +253,9 @@ make_config! {
         extended_logging:       bool,   false,  def,    true;
         /// Log file path
         log_file:               String, false,  option;
+
+        /// Enable DB WAL |> Turning this off might lead to worse performance, but might help if using bitwarden_rs on some exotic filesystems, that do not support WAL
+        enable_db_wal:          bool,   false,  def,    true;
     },
 
     /// Yubikey settings