message: [examples/lang] Make #[no_std] only in non-test builds
diff: // You should have received a copy of the GNU General Public License
  // along with pDSL. If not, see <http://www.gnu.org/licenses/>.
  -#![no_std]
  +#![cfg_attr(not(any(test, feature = "test-env")), no_std)]
  use pdsl_core::{
  storage,
  