[BUG] click is listed only in test requirements but is a required in order to use cucim.clara

[grlee77]

Describe the bug
click should not be required unless the CLI convert tool based on it is used.

Steps/Code to reproduce bug

@drbeh reported that pip installing the recent PyPI release of 24.02 and then trying

from cucim import CuImage

results in

ModuleNotFoundError: No module named 'click'

Expected behavior
It is possible to use cucim.clara classes other than the convert command-line utility if click is not installed.

Environment details (please complete the following information):

Additional context

[jakirkham]

Thanks Greg! 🙏

We should also consider adding a test that tries imports without the test dependencies installed. This could flag similar issues for us in the future

[jakirkham]

Currently this is just in test requirements

cucim/python/cucim/pyproject.toml

Lines 57 to 60 in eee3e4c

	[project.optional-dependencies]
	test = [
	"GPUtil>=1.4.0",
	"click",

The Conda package already makes this a requirement/run

cucim/conda/recipes/cucim/meta.yaml

Lines 70 to 76 in eee3e4c

	run:
	- {{ pin_compatible('cuda-version', max_pin='x', min_pin='x') }}
	{% if cuda_major != "11" %}
	- cuda-cudart
	{% endif %}
	- {{ pin_compatible('numpy') }}
	- click