add build tools

MANIFEST.in

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+include LICENSE
+include README
+include requirements.txt
+include Makefile.jinja2

pyproject.toml

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+[build-system]
+requires = ["setuptools", "wheel"]
+build-backend = "setuptools.build_meta"
+
+[project]
+name = 'reSW'
+version = '0.1.0'
+description = 'Highly customizable static site generator for reStructuredText markup'
+readme = 'README'
+requires-python = ">=3.6"
+keywords = ['reStructuredText', 'SSG', 'static site generator']
+license = {text = 'GNU General Public License v3 or later (GPLv3+)'}
+dependencies = [
+    'colorlog==6.7.0',
+    'docopt==0.6.2',
+    'docutils==0.17.1',
+    'Jinja2==3.1.2',
+    'Pygments==2.13.0',
+    'toml==0.10.2'
+]
+classifiers = [
+    'Programming Language :: Python :: 3.10',
+    'Operating System :: OS Independent'
+]
+
+[project.scripts]
+rsw = 'rsw:cli'
+
+[tool.setuptools]
+py-modules = ['rsw']
+include-package-data = true

setup.py

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+from setuptools import setup
+
+setup()