chore!: package reorg, toolchain migration to uv+ruff+pytest+hatchling, Python 3.11 floor

Drops the `src/` layout. The package lives at `edify/` at repo root, split
into single-purpose subpackages: `builder/` (mixins composing RegexBuilder),
`elements/` (sealed dataclass AST), `compile/` (per-family render functions
plus dispatch), `validate/`, `errors/` (typed exception hierarchy), and
`library/` (per-validator files in family folders). Pattern, serialize,
and result subpackages ship as skeletons.

Replaces tox / virtualenv / flake8+isort+black / setup.py+setup.cfg /
pytest.ini / .coveragerc / .bumpversion.cfg / MANIFEST.in / ci/ /
tests.local.sh with a unified uv + ruff + pytest + hatchling + hatch-vcs
stack driven entirely from pyproject.toml. CI workflow rewritten to
`uv sync --frozen` + `uv run pytest` per matrix entry; required-status-
check names preserved for `check`, `docs`, `py3X (ubuntu)`, and
`pypy311 (ubuntu)`. `py39` / `py310` / `pypy310` dropped (3.11 floor).

Pre-commit replaced with ruff hooks (lint + format), all hook repos
SHA-pinned to commit SHAs.

Tests reorganised under `tests/builder/` and `tests/library/<family>/`
with the `*.test.py` naming shape. 173 tests pass, 100% line coverage.

Behaviour changes versus 0.3 (each will get a documented upgrade-guide
entry once #80 lands):

- `to_regex_string()` returns the bare pattern (no `/.../` wrap)
- `to_regex()` on `named_back_reference` compiles successfully via
  `(?P=name)` instead of raising
- builder errors raise typed `EdifyError` subclasses 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

Closes #68
Closes #69
Closes #253

Co-Authored-By: Claude Opus 4.7 <[email protected]>

1 files changed, 0 insertions, 5 deletions

diff --git a/ci/requirements.txt b/ci/requirements.txt
deleted file mode 100644
index 89f308f..0000000
--- a/ci/requirements.txt
+++ /dev/null
@@ -1,5 +0,0 @@
-virtualenv>=21.5.1
-pip>=25.0
-setuptools>=75.0
-six>=1.17.0
-tox