pyproject.toml -> add black/ruff config sections

thanks to astral-sh/ruff#10026 for suggestion on keeping single line Ellipsis

pyproject.toml

@@ -61,3 +61,35 @@ exclude = ["build123d._dev"]
 [tool.setuptools_scm]
 write_to = "src/build123d/_version.py"
 
+[tool.black]
+target-version = ["py39", "py310", "py311", "py312"]
+line-length = 88
+
+[tool.ruff]
+# Same as Black.
+line-length = 88
+indent-width = 4
+target-version = ["py39", "py310", "py311", "py312"]
+
+[tool.ruff.format]
+# Like Black, use double quotes for strings.
+quote-style = "double"
+
+# Like Black, indent with spaces, rather than tabs.
+indent-style = "space"
+
+# Like Black, respect magic trailing commas.
+skip-magic-trailing-comma = false
+
+# Like Black, automatically detect the appropriate line ending.
+line-ending = "auto"
+
+# Enable auto-formatting of code examples in docstrings. Markdown,
+# reStructuredText code/literal blocks and doctests are all supported.
+#
+# This is currently disabled by default, but it is planned for this
+# to be opt-out in the future.
+docstring-code-format = false
+
+# Keep single-line signatures when body is an Ellipsis
+preview = true