Add monarch CLI as console script in setup.py so that the CLI is installed with the wheel

Summary: Makes it such that `pip install monarch` installs the monarch CLI.

Reviewed By: colin2328

Differential Revision: D74915462

fbshipit-source-id: 24c75430ec9a510d96cb4412763882a583e4eefe

Author: kiukchung

setup.py

@@ -123,6 +123,11 @@ def run(self):
         controller_C,
         common_C,
     ],
+    entry_points={
+        "console_scripts": [
+            "monarch=monarch.tools.cli:main",
+        ],
+    },
     rust_extensions=[
         RustExtension(
             "monarch._rust_bindings",