chore: scaffold payroll extension

Repo tooling and LNbits extension metadata only — no runtime code yet, so
this lands separately from the feature work per the workspace commit rules
(cross-cutting concerns commit first).

- MIT licence, .gitignore, README
- Makefile + pyproject wired for the standard aio fork lint pipeline
  (black + ruff + mypy) and pytest
- config.json declaring id/version/tile so the extension is installable
  from the aiolabs catalog once there is something to install

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_018jy52j9GRZ6XKa1Zt21LLj

pyproject.toml

@@ -0,0 +1,63 @@
+[project]
+name = "lnbits-payroll"
+version = "0.0.0"
+requires-python = ">=3.10,<3.13"
+description = "Recurring salary payouts between LNbits wallets, scheduled by the instance super user."
+authors = [{ name = "aiolabs", email = "dev@aiolabs.dev" }]
+urls = { Homepage = "https://git.atitlan.io/aiolabs/payroll", Repository = "https://git.atitlan.io/aiolabs/payroll" }
+dependencies = [ "lnbits>1" ]
+
+[dependency-groups]
+dev = [
+    "black",
+    "pytest-asyncio",
+    "pytest",
+    "mypy",
+    "pre-commit",
+    "ruff",
+]
+
+[tool.poetry]
+package-mode = false
+
+[tool.mypy]
+plugins = ["pydantic.mypy"]
+
+[tool.pydantic-mypy]
+init_forbid_extra = true
+init_typed = true
+warn_required_dynamic_aliases = true
+warn_untyped_fields = true
+
+[tool.pytest.ini_options]
+log_cli = false
+testpaths = [
+  "tests"
+]
+
+[tool.black]
+line-length = 88
+
+[tool.ruff]
+line-length = 88
+
+[tool.ruff.lint]
+select = ["F", "E", "W", "I", "A", "C", "N", "UP", "RUF", "B"]
+ignore = ["C901"]
+
+fixable = ["ALL"]
+unfixable = []
+
+dummy-variable-rgx = "^(_+|(_+[a-zA-Z0-9_]*[a-zA-Z0-9]+?))$"
+
+[tool.ruff.lint.pep8-naming]
+classmethod-decorators = [
+    "validator",
+    "root_validator",
+]
+
+[tool.ruff.lint.flake8-bugbear]
+extend-immutable-calls = [
+    "fastapi.Depends",
+    "fastapi.Query",
+]