Add a hatchling build backend, a `conandeps` console script and a uv.lock
so `uv tool install .` (or from a git URL) yields a `conandeps` command in
an isolated venv. Add PEP 723 inline metadata to conandeps.py so the single
file also works standalone via `uv run conandeps.py`.
Pin requires-python to <3.12: Conan 1.x imports the removed `imp` module
(the Containerfile comment wrongly blamed distutils). Add uv to the dev
image so both install paths are verified inside the container.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01EYNdaGDrpaqDyT8QtrTQbM
