Implement detection of nested container

[simmplecoder]

Description

This PR implements Miral's idea on supporting nested containers like std::array<std::array<...>> in kernel_2d_adaptor interface.

References

Tasklist

• [X] Implement nested container type detection
• [X] Add tests for nested container type detection
• [ ] Fill in the logic
• [ ] Add test case(s)
• [ ] Ensure all CI builds pass
• [ ] Review and approve