Move the metadata into setup.cfg

Add `pyproject.toml`.
Use `setuptools_scm` for version getting.

pyproject.toml

@@ -0,0 +1,5 @@
+[build-system]
+requires = ["setuptools>=42", "wheel", "setuptools_scm[toml]>=3.4.3"]
+build-backend = "setuptools.build_meta"
+
+[tool.setuptools_scm]

setup.cfg

@@ -1,2 +1,48 @@
+[metadata]
+name = python-rs
+author = Julian Konchunas
+author_email = [email protected]
+license = MIT
+description = Python to Rust transpiler.
+url = http://github.com/konchunas/pyrs
+long_description =
+    Python to Rust transpiler
+
+    This project started as Python to Rust syntax converter. It is not
+    aimed at producing ready-to-compile code, but some basic stuff can be
+    compiled easily.
+
+    It generates unidiomatic non-optimized code with unnecessary
+    allocations, but can reduce amount of edits you have to do when
+    porting Python projects.
+
+    Only basic subset of Python is supported right now and the end goal is
+    to support common cases at least as a placeholders.
+
+    The project is in experimental, so it may crash or silently skip some
+    statements, so be careful.
+
+    Based on Lukas Martinelli Py14
+    (https://github.com/lukasmartinelli/py14) and Py14/python-3
+    (https://github.com/ProgVal/py14/tree/python-3) branch by Valentin
+    Lorentz.
+
+classifiers =
+    License :: OSI Approved :: MIT License
+    Operating System :: OS Independent
+    Programming Language :: Python :: 3
+    Topic :: Software Development
+    Topic :: Utilities
+
+[options]
+packages = pyrs
+python_requires = >=3.0.0
+test_suite = tests
+tests_require = pytest
+
+[options.entry_points]
+console_scripts = pyrs=pyrs.cli:main
+
 [aliases]
 test = pytest
+