feat: add CLI entry point for praisonai_platform

- Added __main__.py with argparse-based CLI
- Support for --host, --port, --reload flags
- Uses uvicorn with factory=True for app creation
- Proper error handling for missing dependencies
- Enables 'python -m praisonai_platform' usage

Fixes #1375

Co-authored-by: MervinPraison <MervinPraison@users.noreply.github.com>

Author: praisonai-triage-agent[bot]

src/praisonai-platform/praisonai_platform/__main__.py

@@ -0,0 +1,59 @@
+"""CLI entry point for PraisonAI Platform server.
+
+Usage:
+    python -m praisonai_platform
+    python -m praisonai_platform --port 9000 --reload
+    python -m praisonai_platform --host 127.0.0.1 --port 8080
+"""
+
+import argparse
+import sys
+
+
+def main() -> None:
+    """Main entry point for the CLI."""
+    parser = argparse.ArgumentParser(
+        description="Start the PraisonAI Platform server",
+        prog="python -m praisonai_platform"
+    )
+    parser.add_argument(
+        "--host",
+        default="0.0.0.0",
+        help="Host to bind the server to (default: 0.0.0.0)"
+    )
+    parser.add_argument(
+        "--port",
+        type=int,
+        default=8000,
+        help="Port to bind the server to (default: 8000)"
+    )
+    parser.add_argument(
+        "--reload",
+        action="store_true",
+        help="Enable auto-reload for development"
+    )
+    
+    args = parser.parse_args()
+    
+    try:
+        import uvicorn
+        from praisonai_platform.api.app import create_app
+        
+        uvicorn.run(
+            "praisonai_platform.api.app:create_app",
+            host=args.host,
+            port=args.port,
+            reload=args.reload,
+            factory=True
+        )
+    except ImportError as e:
+        print(f"Error: Missing required dependency: {e}", file=sys.stderr)
+        print("Please install uvicorn: pip install uvicorn", file=sys.stderr)
+        sys.exit(1)
+    except Exception as e:
+        print(f"Error starting server: {e}", file=sys.stderr)
+        sys.exit(1)
+
+
+if __name__ == "__main__":
+    main()