Update __init__.py

Author: NeuralBlitz

optimizer/__init__.py

@@ -1,3 +1,5 @@
-# quantum_sim/optimizer/__init__.py
+from .hardware_quality_sweeper import HardwareQualitySweeper
+from .sweet_spot_mapper import SweetSpotMapper
+from .qaoa_optimizer import QAOAOptimizer
 
-# This file marks 'optimizer' as a Python package.
+__all__ = ["HardwareQualitySweeper", "SweetSpotMapper", "QAOAOptimizer"]