chore!: package reorg + uv/ruff/pytest/hatchling toolchain + Python 3.11 floor (#255)

## Summary

Closes #68 — package reorganization to a single-purpose, dir-per-concern
layout (no `src/`).
Closes #69 — toolchain migration to `uv` + `ruff` + `pytest` +
`hatchling` + `hatch-vcs`, driven entirely from `pyproject.toml`.
Closes #253.
Closes #259 — drop `.editorconfig`; LF / trim / final-newline / Python
indent now enforced by `mixed-line-ending` (added in fixup) + existing
pre-commit hooks + `ruff format`.— Python floor bump to 3.11; drops
`py39` / `py310` / `pypy310` from the CI matrix.

The three issues are paired by construction (dropping `src/` requires
the new build backend's package discovery, and the 3.11 floor lets the
new layout use `typing.Self`, frozen dataclasses, `match`/`case`, and
Python-3.11 idioms throughout).

## Highlights

**Layout** — `edify/builder/` (RegexBuilder + 11 mixin files + `types/`
for state/flags/frame/protocol), `edify/elements/types/` (sealed
dataclass union: 16 leaves, 7 char-shaped, 4 captures, 7 groups, 9
quantifiers, RootElement), `edify/compile/` (per-family render functions
+ dispatch, plus `quantifier/` subpackage for suffix + apply),
`edify/validate/`, `edify/errors/` (typed exception hierarchy),
`edify/library/` (per-validator files in family folders: `email/`,
`ip/`, `date/`, plus flat single-validator files), `pattern/`,
`serialize/`, `result/` skeletons.

**Toolchain** — replaces `tox` / `virtualenv` / `flake8` / `isort` /
`black` / `setup.py` / `setup.cfg` / `pytest.ini` / `.coveragerc` /
`.bumpversion.cfg` / `MANIFEST.in` / `ci/` / `tests.local.sh` with
`pyproject.toml`-driven `uv` + `ruff` + `pytest` + `hatchling` +
`hatch-vcs`. CI workflow rewritten to `uv sync --frozen` + `uv run
pytest`; required-status-check names preserved (`check`, `docs`, `py311
(ubuntu)`, `py312 (ubuntu)`, `py313 (ubuntu)`, `py314 (ubuntu)`,
`pypy311 (ubuntu)`). Pre-commit replaced with `ruff` hooks, all hook
repos pinned by commit SHA.

**Tests** — reorganised under `tests/builder/` and
`tests/library/<family>/` using the `*.test.py` naming shape. 173 tests,
100% line coverage, ruff lint + format clean, `uv build` produces sdist
+ wheel cleanly.

## Behaviour changes versus 0.3

These will get their own upgrade-guide entries when the migration
tooling lands (#80):

- `to_regex_string()` now returns the bare pattern (no `/.../` wrap).
- `to_regex()` on a named back-reference compiles successfully via
`(?P=name)` instead of raising.
- Builder errors raise typed `EdifyError` subclasses
(`MustBeAStringError`, `StartInputAlreadyDefinedError`, etc.) instead of
bare `Exception` — catch via `except EdifyError`.
- Internal helpers (`apply_quantifier`, `frame_creating_element`,
`evaluate`, `state`, etc.) removed outright per the 0.3 → 1.0 stub-free
policy.

1 files changed, 0 insertions, 80 deletions

diff --git a/setup.py b/setup.py
deleted file mode 100755
index 9547444..0000000
--- a/setup.py
+++ /dev/null
@@ -1,80 +0,0 @@
-#!/usr/bin/env python
-# -*- encoding: utf-8 -*-
-
-import io
-import re
-from glob import glob
-from os.path import basename
-from os.path import dirname
-from os.path import join
-from os.path import splitext
-
-from setuptools import find_namespace_packages
-from setuptools import setup
-
-
-def read(*names, **kwargs):
-    with io.open(join(dirname(__file__), *names), encoding=kwargs.get('encoding', 'utf8')) as fh:
-        return fh.read()
-
-
-setup(
-    name='edify',
-    version='0.3.0',
-    license='Apache-2.0',
-    description='Regular Expressions Made Simple',
-    long_description='{}\n{}'.format(
-        re.compile('^.. start-badges.*^.. end-badges', re.M | re.S).sub('', read('README.rst')),
-        re.sub(':[a-z]+:`~?(.*?)`', r'``\1``', read('CHANGELOG.rst')),
-    ),
-    author='Bobby',
-    author_email='[email protected]',
-    url='https://github.com/luciferreeves/edify',
-    packages=find_namespace_packages('src'),
-    package_dir={'': 'src'},
-    py_modules=[splitext(basename(path))[0] for path in glob('src/*.py')],
-    include_package_data=True,
-    zip_safe=False,
-    classifiers=[
-        # complete classifier list: http://pypi.python.org/pypi?%3Aaction=list_classifiers
-        'Development Status :: 5 - Production/Stable',
-        'Intended Audience :: Developers',
-        'License :: OSI Approved :: Apache Software License',
-        'Operating System :: Unix',
-        'Operating System :: POSIX',
-        'Operating System :: Microsoft :: Windows',
-        'Programming Language :: Python',
-        'Programming Language :: Python :: 3',
-        'Programming Language :: Python :: 3 :: Only',
-        'Programming Language :: Python :: 3.9',
-        'Programming Language :: Python :: 3.10',
-        'Programming Language :: Python :: 3.11',
-        'Programming Language :: Python :: 3.12',
-        'Programming Language :: Python :: 3.13',
-        'Programming Language :: Python :: 3.14',
-        'Programming Language :: Python :: Implementation :: CPython',
-        'Programming Language :: Python :: Implementation :: PyPy',
-        # uncomment if you test on these interpreters:
-        # 'Programming Language :: Python :: Implementation :: IronPython',
-        # 'Programming Language :: Python :: Implementation :: Jython',
-        # 'Programming Language :: Python :: Implementation :: Stackless',
-        'Topic :: Utilities',
-    ],
-    project_urls={
-        'Documentation': 'https://edify.readthedocs.io/',
-        'Changelog': 'https://edify.readthedocs.io/en/latest/changelog.html',
-        'Issue Tracker': 'https://github.com/luciferreeves/edify/issues',
-    },
-    keywords=[
-        # eg: 'keyword1', 'keyword2', 'keyword3',
-    ],
-    python_requires='>=3.9',
-    install_requires=[
-        # eg: 'aspectlib==1.1.1', 'six>=1.7',
-    ],
-    extras_require={
-        # eg:
-        #   'rst': ['docutils>=0.11'],
-        #   ':python_version=="2.6"': ['argparse'],
-    },
-)