Fix: Populate setup.py and add init for package discovery

setup.py

@@ -0,0 +1,19 @@
+from setuptools import setup, find_packages
+
+setup(
+    name="revops_gym",
+    version="0.1.0",
+    description="A Gymnasium environment for SaaS Revenue Operations",
+    author="Your Name",
+    packages=find_packages(),
+    install_requires=[
+        "gymnasium",
+        "numpy",
+        "pandas",
+        "fastapi",
+        "uvicorn",
+        "pydantic",
+        "matplotlib"
+    ],
+    python_requires=">=3.9",
+)