Convert setup.cfg to pyproject.toml via ini2toml

Remove setup.py and setup.cfg entirely — pyproject.toml with
setuptools backend handles everything.

- build-system: setuptools>=61.2
- version + readme: dynamic, read from source
- zest.releaser config preserved as [tool."zest.releaser"]

Author: graingert

NEWLINE.rst

@@ -0,0 +1 @@
+

pyproject.toml

@@ -0,0 +1,53 @@
+[build-system]
+requires = ["setuptools>=61.2,<77"]
+build-backend = "setuptools.build_meta"
+
+[project]
+name = "unittest2pytest"
+authors = [{name = "Hartmut Goebel", email = "h.goebel@crazy-compilers.com"}]
+license = {text = "GPLv3+"}
+description = "Convert unittest test-cases to pytest"
+classifiers = [
+    "Development Status :: 4 - Beta",
+    "Environment :: Console",
+    "Intended Audience :: Developers",
+    "License :: OSI Approved :: GNU General Public License v3 or later (GPLv3+)",
+    "Operating System :: OS Independent",
+    "Programming Language :: Python",
+    "Programming Language :: Python :: 3",
+    "Programming Language :: Python :: 3 :: Only",
+    "Programming Language :: Python :: 3.9",
+    "Programming Language :: Python :: 3.10",
+    "Programming Language :: Python :: 3.11",
+    "Programming Language :: Python :: 3.12",
+    "Programming Language :: Python :: 3.13",
+    "Programming Language :: Python :: 3.14",
+    "Programming Language :: Python :: 3.15",
+    "Topic :: Software Development",
+    "Topic :: Utilities",
+]
+dynamic = ["readme", "version"]
+requires-python = ">=3.9"
+dependencies = ["fissix"]
+
+[project.urls]
+Homepage = "https://github.com/pytest-dev/unittest2pytest"
+
+[project.scripts]
+unittest2pytest = "unittest2pytest.__main__:main"
+
+[tool.setuptools]
+packages = ["unittest2pytest", "unittest2pytest.fixes"]
+zip-safe = false
+include-package-data = false
+
+[tool.setuptools.dynamic]
+readme = {file = ["README.rst", "NEWLINE.rst", "CHANGELOG.rst"], content-type = "text/x-rst"}
+version = {attr = "unittest2pytest.__version__"}
+
+[tool.zest-releaser]
+python-file-with-version = "unittest2pytest/__init__.py"
+push-changes = false
+tag-format = "v{version}"
+tag-message = "unittest2pytest {version}"
+tag-signing = true