[szymonmaszke]

Checklist

• I agree to follow this project's Code of Conduct
• I have read this project's Contributing Guide
• I have created relevant issue(s) and linked them in the PR description

Closes #4

Additional information

Other changes include:

• breaking API (path no longer supported, autoload as the only way to load pyproject.toml or tool config)
• refactored and improved tests

[Copilot]

Pull request overview

This PR introduces first-class pyproject.toml loading and refactors configuration/file lookup internals, alongside a test suite restructure and Python/tooling version bumps. It aligns with the project’s goal of dependency-free TOML config discovery while expanding supported config locations (including .config/{name}.toml) and adding caching for TOML reads.

Changes:

• Add loadfig.pyproject() plus internal _pyproject.py, _file.py, and cached TOML loading via _load.toml().
• Refactor loadfig.config() lookup order (including .config/{name}.toml) and update/expand tests for config + file discovery.
• Update project/tooling metadata (Python versions, workflows, pre-commit, lint config, osv-scanner overrides) and remove the old loadfig.error module.

Reviewed changes

Copilot reviewed 20 out of 21 changed files in this pull request and generated 8 comments.

Show a summary per file

File	Description
tests/test_pyproject.py	Adds tests for loadfig.pyproject() behavior.
tests/test_file.py	Adds tests for low-level file discovery (_file.find).
tests/test_config.py	Refactors config lookup tests and adds coverage for .config/{name}.toml.
src/loadfig/error.py	Removes previous custom error module (breaking change).
src/loadfig/_pyproject.py	Adds implementation of pyproject() discovery/loading.
src/loadfig/_load.py	Introduces cached TOML loading.
src/loadfig/_file.py	Adds VCS-aware file discovery helper.
src/loadfig/_config.py	Refactors config lookup implementation and supported locations.
src/loadfig/init.py	Exports pyproject from the package API.
README.md	Documents new pyproject() API and config locations.
pyproject.toml	Updates Python version targets, scripts, and related tooling config.
osv-scanner.toml	Adds additional package license ignore overrides.
.yamllint.yml	Adjusts YAML line-length configuration.
.pre-commit-config.yaml	Bumps hook revisions.
.github/workflows/tests-reusable.yml	Updates test matrix Python versions.
.github/workflows/run-reusable.yml	Updates default Python version input.
.github/workflows/release-sboms-reusable.yml	Updates Python matrix and adds permission comments.
.github/workflows/release-sbom-run-reusable.yml	Updates default Python version input.
.github/workflows/cache-reusable.yml	Updates cache matrix Python versions.
.github/workflows/cache-item-reusable.yml	Updates default Python version input.

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