Warning Regarding Implicit Binary/Text Mode in zopen for getcif Usage

[k-yoshimi]

When using getcif, the following warning is displayed:

/Users/k-yoshimi/miniconda3/envs/my_pymatgen/lib/python3.12/site-packages/pymatgen/io/cif.py:1764: FutureWarning: We strongly discourage using implicit binary/text `mode`, and this would not be allowed after 2025-06-01. I.e. you should pass t/b in `mode`.
with zopen(filename, mode=mode) as file:

This warning indicates that the use of an implicit binary/text mode with zopen will no longer be allowed after June 1, 2025. To ensure compatibility with future versions, it is recommended to explicitly specify 't' (text) or 'b' (binary) in the mode argument when opening files.

Proposed Solution:
Update the zopen call in getcif to explicitly specify the file mode ('t' or 'b'), as suggested in the warning. This change will ensure compatibility with future versions of Python and avoid potential runtime errors.

Please let me know if any additional details or clarification are required.