add: configure files (setup.py->setup.py+setup.cfg+pyproject.toml)

setup.cfg

@@ -1,6 +1,69 @@
 [metadata]
-description-file = README.md
-license_file = LICENSE
+name = attr: waybackpy/__version__.__title__
+version = attr: waybackpy/__version__.__version__
+description = attr: waybackpy/__version__.__description__
+long_description = file: README.md
+long_description_content_type = text/markdown
+license = attr: waybackpy/__version__.__license__
+author = attr: waybackpy/__version__.__author__
+author_email = attr: waybackpy/__version__.__author_email__
+url = attr: waybackpy/__version__.__url__
+download_url = attr: waybackpy/__version__.__download_url__
+project_urls =
+    Documentation = https://github.com/akamhy/waybackpy/wiki
+    Source = https://github.com/akamhy/waybackpy
+    Tracker = https://github.com/akamhy/waybackpy/issues
+keywords =
+    Archive Website
+    Wayback Machine
+    Internet Archive
+    Wayback Machine CLI
+    Wayback Machine Python
+    Internet Archiving
+    Availability API
+    CDX API
+    savepagenow
+classifiers =
+    Development Status :: 4 - Beta
+    Intended Audience :: Developers
+    Natural Language :: English
+    License :: OSI Approved :: MIT License
+    Programming Language :: Python
+    Programming Language :: Python :: 3
+    Programming Language :: Python :: 3.4
+    Programming Language :: Python :: 3.5
+    Programming Language :: Python :: 3.6
+    Programming Language :: Python :: 3.7
+    Programming Language :: Python :: 3.8
+    Programming Language :: Python :: 3.9
+    Programming Language :: Python :: 3.10
+    Programming Language :: Python :: Implementation :: CPython
+
+[options]
+packages =
+    waybackpy
+python_requires = >= 3.4
+install_requires =
+    requests
+    click
+
+[options.extras_require]
+dev =
+    black
+    flake8
+    isort
+
+[options.entry_points]
+console_scripts =
+    waybackpy = waybackpy.cli:main
+
+[isort]
+profile = black
+
+[flake8]
+# E501: line too long
+ignore = E501
+indent-size = 4
 
 [flake8]
 max-line-length = 88