add treewide pyproject.toml

Than we don't need a pyproject.toml per script

nixosModules/clanCore/zerotier/pyproject.toml

@@ -1,35 +0,0 @@
-[tool.mypy]
-python_version = "3.10"
-warn_redundant_casts = true
-disallow_untyped_calls = true
-disallow_untyped_defs = true
-no_implicit_optional = true
-exclude = "clan_cli.nixpkgs"
-
-[tool.ruff]
-line-length = 88
-
-select = [ "E", "F", "I", "U", "N"]
-ignore = [ "E501" ]
-
-[tool.black]
-line-length = 88
-target-version = [ "py310" ]
-include = "\\.pyi?$"
-exclude = '''
-/(
-    \.git
-  | \.hg
-  | \.mypy_cache
-  | \.tox
-  | \.venv
-  | _build
-  | buck-out
-  | build
-  | dist
-  # The following are specific to Black, you probably don't want those.
-  | blib2to3
-  | tests/data
-  | profiling
-)/
-'''