Add setup files to be able to install the package

setup.cfg

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+[metadata]
+name = pygnunetrest
+description = Python GNUnet REST client
+author = nkls, juga
+author_email = nkls@pep.foundation, juga@riseup.net
+license = GPLv3
+url = https://gitea.pep.foundation//pEp.foundation/pygnunetrest.git
+keywords = email pEp OpenPGP remailer mixmaster
+classifiers =
+    Development Status :: 4 - Beta
+    Environment :: Console
+    Intended Audience :: Developers
+    Intended Audience :: System Administrators
+    License :: OSI Approved :: GNU General Public License v3 (GPLv3)
+    Natural Language :: English
+    Operating System :: POSIX :: Linux
+    Programming Language :: Python :: 3.7
+    Programming Language :: Python :: 3.8
+    Programming Language :: Python :: 3.9
+    Topic :: Communications :: Email
+    Topic :: Security :: Cryptography
+    Topic :: System :: Networking
+long_description = file: README.md
+project_urls =
+    Source = https://gitea.pep.foundation//pEp.foundation/pygnunetrest.git
+    Tracker = https://gitea.pep.foundation/pEp.foundation/pygnunetrest/issues
+
+[options]
+packages = find:
+include_package_data = True
+python_requires = >= 3.7
+install_requires =
+    requests >= 2.21
+# To automatically write the version from a SCM.
+# setup_requires = setuptools_scm

setup.py

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+from setuptools import setup
+
+# setup(use_scm_version=True)
+setup()