Add a FortranPattern: CoR(Chain of Responsibility)

[zoziha]

• CoR (Chain of Responsibility)

Description

Hello, your FortranPatterns is very representative, it provides many excellent templates for our Fortran object-oriented programming.
I am very happy to try to improve FortranPatterns, even if it is just a simple contribution.
This time I try to add CoR Pattern to FortranPatterns, I refer to the idea of this webpage.

Notes

I try to add fpm support for FortranPatterns (maybe the next PR submission is to add fpm support) for more east-to-use.
fpm(Fortran Package Manager) is a build system and package manager being developed for Fortran by the Fortran-lang organization. The detailed introduction of fpm is in its repo.

Hope this PR gets your approval, thank you! 😘