Python package depends implicitly on pylance

[wjones127]

We don't have any explicit dependency on pylance:

But we will import it here:

lance-namespace/python/lance_namespace/lance_namespace/__init__.py

Lines 1021 to 1024 in be04429

	NATIVE_IMPLS: Dict[str, str] = {
	"rest": "lance.namespace.RestNamespace",
	"dir": "lance.namespace.DirectoryNamespace",
	}

lance-namespace/python/lance_namespace/lance_namespace/__init__.py

Lines 1094 to 1097 in be04429

	impl_class = NATIVE_IMPLS.get(impl) or _REGISTERED_IMPLS.get(impl) or impl
	try:
	module_name, class_name = impl_class.rsplit(".", 1)
	module = importlib.import_module(module_name)

For now, we should list pylance as a dependency.

But separately, I think we should consider if we can make pylance not a required dependency. That's a pretty heavy dependency to add, given it has the full datafusion query engine embedded.

lancedb/lancedb#3053