[scotch] add new port

[Neumann-A]

• Changes comply with the maintainer guide
• The name of the port matches an existing name for this component on https://repology.org/ if possible, and/or is strongly associated with that component on search engines.
• Optional dependencies are resolved in exactly one way. For example, if the component is built with CMake, all find_package calls are REQUIRED, are satisfied by vcpkg.json's declared dependencies, or disabled with CMAKE_DISABLE_FIND_PACKAGE_Xxx
• The versioning scheme in vcpkg.json matches what upstream says.
• The license declaration in vcpkg.json matches what upstream says.
• The installed as the "copyright" file matches what upstream says.
• The source code of the component installed comes from an authoritative source.
• The generated "usage text" is accurate. See adding-usage for context.
• The version database is fixed by rerunning ./vcpkg x-add-version --all and committing the result.
• Only one version is in the new port's versions file.
• Only one version is added to each modified port's versions file.

[Cheney-W]

    find_package(SCOTCH CONFIG REQUIRED)
    target_link_libraries(main PRIVATE SCOTCH::scotch SCOTCH::scotcherr SCOTCH::scotcherrexit)

Usage passed with following triplets:
x86-windows
x64-windows

[Cheney-W]

@Neumann-A
Should the following folders also be deleted?

vcpkg\packages\scotch_x64-windows\man
vcpkg\packages\scotch_x64-windows\debug\man

[Cheney-W]

Moving the PR to draft. When you respond, please revert to "ready for review".