Not compatible with Python 3.14

[lengau]

Bug Description

craft-cli is not compatible with Python 3.14 due to this upstream issue in the overrides module. It's unclear whether the module is still being developed, as the last commit to the main branch was over a year ago

To Reproduce

uv run --python=3.14 pytest

part yaml

Relevant log output

____________________________________________________________________________________________________ ERROR collecting tests/unit/test_completion.py _____________________________________________________________________________________________________
tests/unit/test_completion.py:32: in <module>
from overrides import override
.venv/lib/python3.14/site-packages/overrides/__init__.py:8: in <module>
from overrides.overrides import __VERSION__, overrides, override
.venv/lib/python3.14/site-packages/overrides/overrides.py:26: in <module>
from overrides.signature import ensure_signature_is_compatible
.venv/lib/python3.14/site-packages/overrides/signature.py:6: in <module>
from .typing_utils import get_args, issubtype
.venv/lib/python3.14/site-packages/overrides/typing_utils.py:50: in <module>
typing.ByteString: bytes,  # https://docs.python.org/3/library/typing.html#typing.ByteString
../../../.local/share/uv/python/cpython-3.14.0a4-linux-x86_64-gnu/lib/python3.14/typing.py:3840: in __getattr__
raise AttributeError(f"module {__name__!r} has no attribute {attr!r}")
E   AttributeError: module 'typing' has no attribute 'ByteString'
================================================================================================================ short test summary info ================================================================================================================
ERROR tests/unit/test_completion.py - AttributeError: module 'typing' has no attribute 'ByteString'
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! Interrupted: 1 error during collection !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

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The internal ticket has been created: https://warthogs.atlassian.net/browse/CRAFT-4647.

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