chore: add test + lint tooling (pyproject, Makefile)

Poetry/pytest/ruff/black/mypy config mirroring the aio extension lint
pipeline (spirekeeper template). `make test` runs pytest; `make check`
runs the linters. Enables a tests/ suite for the extension.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_019VUQCfdqiLSsFS2jcGnaFD

Makefile

@@ -0,0 +1,25 @@
+all: format check
+
+format: black ruff
+
+check: mypy checkblack checkruff
+
+mypy:
+	poetry run mypy .
+
+black:
+	poetry run black .
+
+ruff:
+	poetry run ruff check . --fix
+
+checkruff:
+	poetry run ruff check .
+
+checkblack:
+	poetry run black --check .
+
+test:
+	PYTHONUNBUFFERED=1 \
+	DEBUG=true \
+	poetry run pytest

pyproject.toml

@@ -0,0 +1,60 @@
+[tool.poetry]
+name = "chatelet"
+version = "0.1.0"
+description = "Nostr-native room rentals (Airbnb-style) for LNbits"
+authors = ["padreug <padreug@aiolabs.dev>"]
+
+[tool.poetry.dependencies]
+python = "^3.10 | ^3.9"
+lnbits = {version = "*", allow-prereleases = true}
+mypy = "^1.13.0"
+
+[tool.poetry.group.dev.dependencies]
+black = "^24.3.0"
+pytest-asyncio = "^0.21.0"
+pytest = "^7.3.2"
+mypy = "^1.5.1"
+pre-commit = "^3.2.2"
+ruff = "^0.3.2"
+pytest-md = "^0.2.0"
+
+[build-system]
+requires = ["poetry-core>=1.0.0"]
+build-backend = "poetry.core.masonry.api"
+
+[tool.mypy]
+[[tool.mypy.overrides]]
+module = [
+  "lnbits.*",
+  "loguru.*",
+  "fastapi.*",
+  "pydantic.*",
+]
+ignore_missing_imports = "True"
+
+[tool.pytest.ini_options]
+log_cli = false
+testpaths = [
+  "tests"
+]
+
+[tool.black]
+line-length = 88
+
+[tool.ruff]
+line-length = 88
+
+[tool.ruff.lint]
+# F pyflakes / E,W pycodestyle / I isort / A builtins / C mccabe / N naming
+# UP pyupgrade / RUF ruff / B bugbear
+select = ["F", "E", "W", "I", "A", "C", "N", "UP", "RUF", "B"]
+ignore = ["UP007"]  # keep Optional[X] on py3.10
+fixable = ["ALL"]
+unfixable = []
+dummy-variable-rgx = "^(_+|(_+[a-zA-Z0-9_]*[a-zA-Z0-9]+?))$"
+
+[tool.ruff.lint.flake8-bugbear]
+extend-immutable-calls = [
+    "fastapi.Depends",
+    "fastapi.Query",
+]