[WIP] Refactor import to modern C++ and CUDA

[Copilot]

Refactor to Modern C++ and CUDA with Config Class

Plan

• Create a Config header class to centralize all simulation parameters

  • Define SimulationConfig struct with all common parameters
  • Define KobayashiConfig for Kobayashi model-specific parameters
  • Define PhysicalConfig for Physical model-specific parameters
  • Use modern C++ features (constexpr, inline variables, structs)

• Refactor Kobayashi GPU implementation

  • Update KobayashiGPU.cu to use Config class
  • Replace hardcoded constants with config references
  • Modernize CUDA memory management (use modern patterns)
  • Update wrapper.h to support config-based parameters
  • Update vtk.h to use config-based parameters

• Refactor Kobayashi CPU implementation

  • Update KobayashiCPU.cpp to use Config class
  • Replace hardcoded constants with config references

• Refactor Physical GPU implementation

  • Update PhaseField.cu to use Config class
  • Replace hardcoded constants with config references

• Refactor Physical CPU implementation

  • Update PhaseFieldCPU.cpp to use Config class
  • Replace hardcoded constants with config references

• Build and test all implementations

  • Test CPU implementations
  • Test GPU implementations (if CUDA available)

• Code review and security check

Original prompt

• Refactor impor to modern c++ and cuda
• Utilize config class

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