feat: add construct_lightcone_form_filelist

[steven-murray]

Add a simpler lightcone function for 21cmFAST output structs in files.

[Copilot]

Pull Request Overview

This PR introduces a new function construct_lightcone_from_filelist that allows creating lightcones directly from a list of 21cmFAST output struct files, providing a simpler alternative to the existing cache-based approach.

• Adds construct_lightcone_from_filelist function for direct file-based lightcone construction
• Updates existing tests to use more realistic redshift ranges and dynamic shape assertions
• Adds comprehensive test coverage for the new file-based lightcone construction

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 2 comments.

File	Description
src/tuesday/simulators/py21cmfast/lightcones.py	Implements the new construct_lightcone_from_filelist function and updates imports
tests/test_simulators/test_py21cmfast/test_lightcones.py	Adds test coverage for the new function and improves existing tests

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[Copilot]

The docstring references a global_quantities parameter that doesn't exist in the function signature. This parameter should be removed from the documentation or added to the function.

Suggested change

	global_quantities
	A list of global quantities to extract. These must exist in the files
	given.

[Copilot]

This comment indicates a temporary workaround that may become obsolete. Consider adding a TODO comment or tracking issue to revisit this implementation when newer versions of 21cmFAST are available.

Suggested change

	for box in boxes:
	for box in boxes:
	# TODO: Remove this hack when upgrading to a newer version of 21cmFAST that natively supports this.