Mirrors aio-libs/aiosignal#692 and aio-libs/aiosignal#693 for
propcache.

Adds a top-level `tox.ini` with envs for building dists,
metadata validation, pre-commit, and the doc builders so the
same automation runs locally and in CI.

Expands `pre-setup` to compute the cache key, project name, dist
version (parsed from `src/propcache/__init__.py`) and the exact
sdist/wheel artifact filenames so reusable workflows and hooks
can address them by name.

Replaces `build-pure-python-dists` with a `build` job that calls
`tox-dev/workflow/.github/workflows/reusable-tox.yml@89de3c6` with
`toxenv: build-dists`. A new `.github/reusables/.../post-tox-run`
hook verifies the expected artifact names exist and uploads them
under `python-package-distributions` so the cibuildwheel, test,
benchmark and deploy jobs keep finding them.

Adds a new `lint` job that runs `pre-commit` through the same
reusable workflow, with a `post-src-checkout` hook for caching
`~/.cache/pre-commit`. The existing `reusable-linters.yml` is
kept as `retro-lint` so MyPy coverage upload to Coveralls,
`twine check` and `make doc-spelling` continue to gate CI during
the transition. Other lint envs (`metadata-validation`,
`build-docs`, `doctest-docs`, `spellcheck-docs`) are defined in
`tox.ini` but left commented out in the matrix; flipping them on
is a follow-up once `retro-lint` is retired.

Adds `env` and `tox` to the spell-check wordlist for the
`CHANGES/243.contrib.rst` fragment.

The `Setup Python` step in the test matrix was taking ~62s on
`windows-latest` for `3.14t` because hosted runners don't keep
free-threaded CPython in the tool-cache and `actions/setup-python`
falls back to downloading it from the `python-versions` repo on
each run.

Switches the test matrix, the benchmark job, and the linter job
in `reusable-linters.yml` to `astral-sh/setup-uv@v8.1.0` with
`activate-environment: true` and `enable-cache: true`. uv pulls
python-build-standalone from a CDN in a few seconds and persists
its wheel cache across runs in place of the
`re-actors/cache-python-deps` wrapper.

Drops the `pip --dry-run --report=- | jq` wheel-discovery trick
and the follow-up `pip install <url>` from both the test and
benchmark jobs in favour of a single `uv pip install
--find-links=./dist --no-index --no-deps --force-reinstall
--only-binary=:all: propcache` call; uv resolves the matching
wheel for the active interpreter directly.

Also drops the `tox-tool-deps: tox` override on the `build` and
`lint` jobs so the reusable workflow's default `tox tox-uv` kicks
in and tox env installs use uv instead of pip.

`allow-prereleases` has no equivalent on setup-uv; uv treats
prereleases as first-class. The Codecov flag derived from
`steps.python-install.outputs.python-version` now reports the
matrix spec (`3.14t`) rather than the resolved patch (`3.14.5t`).

webknjaz flagged
#243 (comment)
that the `wheel-artifact-name` output reads like *the* wheel
filename, but propcache produces a matrix of binary wheels via
cibuildwheel as well; only the pure-Python wheel goes through
the `build` job and matches this format.

Renames the output to `pure-python-wheel-artifact-name` and
updates the `post-tox-run` hook accordingly. Also drops the
now-dead `built-wheel-names` expression from the lint matrix
since `metadata-validation` moved to its own job in the
previous commit and was the only consumer.

The `spellcheck-docs` toxenv already exists and the lint matrix
expression already special-cases it (Git checkout instead of
sdist, longer 6-minute timeout for the I/O). Flipping it on
gives the same `make -C docs spelling` coverage with one fewer
hand-rolled step in `reusable-linters.yml`.

retro-lint now only carries the MyPy/Coveralls upload.

…-lint

The `pre-commit` toxenv in the new lint matrix already runs
pre-commit (and through it, the MyPy hook that writes
`.tox/.tmp/.mypy/python-3.11/cobertura.xml`). Move the Coveralls
upload of that report into a `post-tox-job` hook gated on
`toxenv == 'pre-commit'`, mirroring the awx-plugins pattern flagged
in
#243 (comment).

With that, `retro-lint` has no more unique coverage:
`spellcheck-docs`, `metadata-validation`, and `pre-commit` all run
through tox-dev/workflow. Drop the `retro-lint` job and delete
`reusable-linters.yml`. `test-summary.needs` is updated to drop
`retro-lint`.

Also tightens the `calling-job-context` input description across
the three hooks (`post-src-checkout`, `post-tox-run`,
`post-tox-job`).

… propcache

`sphinxcontrib-towncrier` invokes `python -m towncrier build --draft`
to render the unreleased changelog into `docs/changes.rst`.
Towncrier reads `tool.towncrier.package = "propcache"` and tries
to import `propcache` to look up the project name, which fails in
the `spellcheck-docs` tox env because it has `package = skip` and
no installed propcache:

    ERROR: tried to import propcache, but ran into this error:
    No module named 'propcache'

`towncrier.get_project_name` returns the configured `name` value
without importing when it's set. Set `name = "propcache"` so the
docs build no longer needs the package to be importable.

(Versioning is unaffected: `sphinxcontrib-towncrier` always passes
`--version`, so the version lookup path that still imports the
package is not exercised here.)

The tox envs were already defined and run cleanly locally. They
were left commented out by inheritance from the aiosignal narrow
rollout pattern; enabling them gates docs build failures and
exercises any doctest blocks that get added later.

…source

`metadata-validation`, `build-docs`, and `doctest-docs` use the
sdist as their working directory in CI (via
`re-actors/checkout-python-sdist`). The tox-dev/workflow reusable
gates each hook on `hashFiles(...) != ''`, which evaluates against
the extracted sdist tree — so any hook not packaged into the sdist
is silently skipped.

That's exactly how `metadata-validation` blew up: the
`post-src-checkout` step that downloads every
`python-package-distributions*` artifact into `dist/` was skipped,
so `twine check dist/*` had nothing to validate and failed with
`InvalidDistribution: Cannot find file (or expand pattern)`.

Add `graft .github/reusables` so the three hook action.yml files
travel with the sdist.