Run CI with lowest versions of dependencies

[hombit]

Feature request

It would be the same as in astronomy-commons/hats#502, but would also use requirements.txt:

uv pip compile --resolution=lowest --constraint=requirements.txt --only-binary=:all: -o requirements_lowest.txt pyproject.toml

We also should have a policy to always set hats>= and nested-pandas>= to their most recent versions

Related to the work done with PPT lincc-frameworks/python-project-template#495 lincc-frameworks/python-project-template#515

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• I have included any relevant links, screenshots, environment information, and data relevant to implementing the requested feature, as well as pseudocode for how I want to access the new functionality.
• If I have ideas for how the new feature could be implemented, I have provided explanations and/or pseudocode and/or task lists for the steps.