add setup.py to enable "pip install -e . " installs

setup.py

@@ -0,0 +1,29 @@
+import supabase_py
+
+import setuptools
+
+
+def get_package_description() -> str:
+    """Returns a description of this package from the markdown files."""
+    with open("README.md", "r") as stream:
+        readme: str = stream.read()
+    return readme
+
+
+setuptools.setup(
+    name="mitto",
+    version=supabase_py.__version__,
+    author="Joel Lee, Leon Fedden",
+    author_email="joel@joellee.org",
+    description="Supabase client for Python.",
+    long_description=get_package_description(),
+    long_description_content_type="text/markdown",
+    url="https://github.com/supabase/supabase-py",
+    packages=setuptools.find_packages(),
+    classifiers=[
+        "Programming Language :: Python :: 3",
+        "License :: OSI Approved :: MIT License",
+        "Operating System :: OS Independent",
+    ],
+    python_requires=">=3.7",
+)