adding initial CLI support

src/crewai/cli/templates/main.py

@@ -0,0 +1,8 @@
+#!/usr/bin/env python
+from .crew import {{crew_name}}Crew
+
+
+def run():
+    # Replace with your inputs, it will automatically interpolate any tasks and agents information
+    inputs = {'topic': 'AI LLMs'}
+    {{crew_name}}Crew().crew().kickoff(inputs=inputs)