Make GAM pip-installable (#1417)

* wip: make pip-installable

* resolve @jay0lee's comments

src/setup.cfg

@@ -0,0 +1,49 @@
+[metadata]
+name = GAM for Google Workspace
+version = 6.0.7
+description = Command line management for Google Workspaces
+long_description = file: readme.md
+long_description_content_type = text/markdown
+url = https://github.com/jay0lee/GAM
+author = Jay Lee
+author_email = jay0lee@gmail.com
+license = Apache
+license_file = src/license.rtf
+keywords = google, oauth2, gsuite, google-apps, google-admin-sdk, google-drive, google-cloud, google-calendar, gam, google-api, oauth2-client, google-workspace
+classifiers =
+    Programming Language :: Python :: 3
+    Programming Language :: Python :: 3 :: Only
+    Programming Language :: Python :: 3.6
+    Programming Language :: Python :: 3.7
+    Programming Language :: Python :: 3.8
+    Programming Language :: Python :: 3.9
+    License :: OSI Approved :: Apache License
+
+[options]
+packages = find:
+python_requires = >=3.6
+install_requires =
+    cryptography
+    distro
+    filelock
+    google-api-python-client >= 2.1
+    google-auth-httplib2
+    google-auth-oauthlib >= 0.4.1
+    google-auth >= 1.11.2
+    httplib2 >= 0.17.0
+    importlib.metadata
+    passlib >= 1.7.2
+    python-dateutil
+    yubikey-manager >= 4.0.0
+    pathvalidate
+
+# used during pip install .[test]
+[options.extras_require]
+test = pre-commit
+
+[options.entry_points]
+console_scripts =
+    gam = gam.__main__:main
+
+[bdist_wheel]
+universal = True

src/setup.py

@@ -0,0 +1,3 @@
+from setuptools import setup
+
+setup()