chore: finish migration off pip-tools/tox onto uv

[hf-krechan]

Summary

• The repo had already moved dev dependencies to PEP 735 [dependency-groups] and dropped pip-compile'd dev requirements, but kept tox/tox-uv as an intermediate layer and still generated a top-level requirements.txt with pip-compile.
• This finishes the migration: removes tox.ini and the top-level requirements.in/requirements.txt, and rewrites CI workflows to call uv sync --group <group> + uv run <tool> directly instead of uv run tox -e <env>.
• Drops the packaging dependency-group (build, twine) in favor of uv build / uv publish --dry-run natively, and removes pip-tools from the dev group.
• Adds [tool.uv] default-groups = [] so per-group CI jobs (linting, type_check, ...) don't silently also install the whole dev group.
• Adds the astral-sh/uv-pre-commit uv-lock hook to keep uv.lock current automatically.
• Updates README, contributing guide, .vscode/settings.json, and stale in-code comments that referenced tox.
• docs/requirements.txt is intentionally kept — the sphinx-notes/pages action needs a standalone requirements file at a known path.

Test plan

• uv lock — resolves cleanly, drops build/twine/pip-tools and their transitive deps
• uv sync --group dev + uv run pytest — 107 passed
• uv sync --group linting + uv run pylint src/bo4e / generate_or_validate_json_schemas.py — 10.00/10
• uv sync --group type_check + uv run mypy on src/bo4e, tests, generate_or_validate_json_schemas.py — no issues
• uv sync --group coverage + uv run coverage run/html/report --fail-under 99 — 99% (passes)
• uv sync --group json_schemas + uv run python generate_or_validate_json_schemas.py --mode generate — matches CI invocation
• uv sync --group docs + uv run python -c "import bo4e; print(bo4e.__gh_version__)" — works
• uv build + uv publish --dry-run — builds sdist/wheel, dry-run exits 0
• pre-commit run --all-files — all hooks pass, including the new uv-lock hook
• grep -rnE "setup-uv@v[0-9]+$" .github/workflows/ — no floating-major tags
• Real CI run on this PR (required status checks: tests (3.10/3.11/3.12, ubuntu-latest), Python Code Quality and Lint (3.12, ubuntu-latest, {linting,type_check,dev}), coverage (3.12, ubuntu-latest), formatting, Check Docs (3.12, ubuntu-latest)) — matrix job names were kept unchanged so required-check names still match

🤖 Generated with Claude Code

[Copilot]

Pull request overview

Completes the repository’s migration away from pip-tools/tox to a direct uv-based workflow by removing legacy requirements/tox config and updating CI + contributor docs to use uv sync --group … and uv run … directly.

Changes:

• Removes tox.ini and top-level requirements.in / requirements.txt, and updates uv.lock accordingly (dropping pip-tools, build, twine, and related transitive deps).
• Rewrites GitHub Actions workflows to run per-group CI tasks via uv sync --group <group> and uv run <tool> (tests, linting, type checks, coverage, docs, packaging).
• Updates developer documentation and tooling: adds [tool.uv] default-groups = [], introduces uv-lock pre-commit hook, updates VS Code interpreter path, and refreshes tox-referencing comments.

Reviewed changes

Copilot reviewed 16 out of 19 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
uv.lock	Updates locked dependency graph to reflect removal of tox/pip-tools and packaging tool deps.
tox.ini	Removes tox configuration entirely as part of the uv-only migration.
scripts/generate_docs_assets.py	Updates documentation-generation prerequisites and local link paths to match the new uv/docs build layout.
requirements.txt	Removes top-level pip-compiled requirements output.
requirements.in	Removes top-level pip-compile input file.
README.rst	Updates contributor instructions to run checks via uv groups instead of tox.
pyproject.toml	Drops the packaging dependency group, removes pip-tools from dev, and sets tool.uv.default-groups = [].
generate_or_validate_json_schemas.py	Updates module comments/instructions from tox-based to uv-group-based invocation.
docs/contributing_guide.rst	Rewrites contributor workflow guidance to use uv sync/uv run directly (no tox).
.vscode/settings.json	Points the Python interpreter to .venv/bin/python instead of .tox/....
.pre-commit-config.yaml	Adds astral-sh/uv-pre-commit uv-lock hook to keep uv.lock current.
.gitignore	Removes .tox/ ignore entry as tox is removed.
.github/workflows/tests.yml	Runs tests via uv sync --group tests and uv run pytest.
.github/workflows/test_docs.yml	Runs docs checks via uv (sync + schema generation + asset generation + sphinx-build + doctest).
.github/workflows/python-publish.yml	Updates release workflows to use uv directly (tests, schema generation, docs build steps, and uv build).
.github/workflows/packaging_test.yml	Replaces tox packaging env with uv build + uv publish --dry-run.
.github/workflows/linting.yml	Replaces tox envs with group-specific uv sync + direct pylint/mypy/pre-commit commands.
.github/workflows/docs_latest.yml	Updates docs deployment workflow to use uv sync and direct schema + asset generation steps.
.github/workflows/coverage.yml	Runs coverage via uv sync --group coverage and direct coverage run/html/report.

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