Callable memory estimate

src/py21cmfast/__init__.py

@@ -20,6 +20,7 @@
 from . import cache_tools, inputs, outputs, plotting, wrapper
 from ._cfg import config
 from ._logging import configure_logging
+from ._memory import print_memory_estimate
 from .cache_tools import query_cache
 from .outputs import (
     Coeval,