PR for updated halophot

[JonatanRudrasingam]

• Analyze CI failure: python setup.py install doesn't install install_requires deps
• Add tqdm to requirements.txt (it's imported in halo_tools.py but was missing)
• Remove k2sc from requirements.txt (installed separately from GitHub in CI; avoids PyPI lookup failures)
• Remove pybind11 from requirements.txt (build tool, not a runtime dependency)
• Update CI workflow: add pip install -r requirements.txt step and replace python setup.py install with pip install --no-deps .

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[benjaminpope]

@copilot fix the dependencies issues - it is currently failing with

from statsmodels.nonparametric.bandwidths import select_bandwidth
E   ModuleNotFoundError: No module named 'statsmodels'

Search for any other dependency issues and edit this PR to fix them.

[Copilot]

@copilot fix the dependencies issues - it is currently failing with

from statsmodels.nonparametric.bandwidths import select_bandwidth

...

Fixed in commit fa6ea0b. The root cause was that python setup.py install in newer setuptools no longer installs install_requires dependencies — so statsmodels and other packages were never being installed.

Changes made:

1. CI workflow (github-workflow.yml): Added an explicit pip install -r requirements.txt step and replaced python setup.py install with pip install --no-deps .
2. requirements.txt: Added missing tqdm (imported in halo_tools.py but was absent), removed k2sc (already installed from GitHub in a separate CI step), and removed pybind11 (build tool, not a runtime dependency).