feat: optional file loading and upgrades

[zifeo]

No description provided.

[Copilot]

Pull Request Overview

This PR adds support for optionally allowing missing files when loading configurations and updates several dependency versions and configurations.

• Introduces a new test to validate the behavior of allow_missing when loading files.
• Updates the file-loading method in dataconf/main.py to include the allow_missing parameter.
• Upgrades dependency versions and adjusts configurations in pyproject.toml, .pre-commit-config.yaml, and ruff.toml; also updates an error message in utils.py for consistency.

Reviewed Changes

Copilot reviewed 7 out of 7 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
tests/test_multi.py	Adds tests for file loading with allow_missing behavior
dataconf/main.py	Updates the file function signature to support allow_missing
ruff.toml	Adjusts ruff configuration to ignore E501, with updated version
pyproject.toml	Upgrades dependency versions including pyparsing and testing libraries
.pre-commit-config.yaml	Updates pre-commit hooks to use newer versions
dataconf/utils.py	Refactors error string quoting in the unexpected keys exception

Comments suppressed due to low confidence (2)

tests/test_multi.py:72

• [nitpick] The inner dataclass in test_non_existent_file is named 'A', which may shadow an outer 'A'. Consider renaming it for clarity.

@dataclass

dataconf/utils.py:107

• [nitpick] Consider using a consistent quoting style in error messages to match the rest of the codebase.

f'unexpected key(s) "{', '.join(unexpected_keys)}" detected for type {clazz} at {path}'