Fix misleading docstring in the "create_cvxpy_problem" method

[lwins-lights]

Summary

This pull request updates the docstring for the create_cvxpy_problem method in the Optimization class to correct misleading information. It also fixes minor formatting issues (e.g., misaligned tabs) in the solve method's docstring to improve consistency.

Changes

• Updated the docstring for create_cvxpy_problem:
  • Corrected the misleading claim that it returns a cvxpy.Problem object
  • Clarified that it stores objectives and constraints internally in self.obj and self.constraints
• Removed misaligned tabs in another docstring of solve for consistency

Notes

• No changes were made to functioning code and this is a documentation-only PR

[gourav3017]

Changes are appropriate. Adding them to PortPy