Add setup.py to make deepshell installable

deepshell-backend/setup.py

@@ -0,0 +1,21 @@
+from setuptools import setup, find_packages
+
+setup(
+    name="deepshell",
+    version="1.0.0",
+    packages=find_packages(),
+    install_requires=[
+        "typer>=0.9.0",
+        "rich>=13.0.0",
+        "litellm==1.74.9.post1",
+        "python-dotenv>=0.19.0",
+        "prompt-toolkit>=3.0.0",
+        "pydantic>=2.0.0",
+        "click>=8.0.0",
+    ],
+    entry_points={
+        "console_scripts": [
+            "deepshell=deepshell.cli:main",  # Adjust if your CLI entry point differs
+        ],
+    },
+)