[backward-cpp]Update version

[endingly]

• Changes comply with the maintainer guide
• SHA512s are updated for each updated download
• The "supports" clause reflects platforms that may be fixed by this new version
• Any fixed CI baseline entries are removed from that file.
• Any patches that are no longer applied are deleted from the port's directory.
• The version database is fixed by rerunning ./vcpkg x-add-version --all and committing the result.
• Only one version is added to each modified port's versions file.

Fix complier error on mingw plateform

[dg0yt]

AFAIU the package has dependencies on other libs, and some are provided by vcpkg ports. It would be good to ensure that no dependency accidentally becomes an undeclared artifact dependency.

[dg0yt]

They install an unusual CMake config file, probably for header-only usage. Some patterns are really strange.
vcpkg's usage heuristics doesn't work well for them. I suggest installing a share/backward-cpp/usage file:

backward-cpp provides CMake targets:

  find_package(Backward CONFIG REQUIRED)
  # To use the header library
  target_link_libraries(main PRIVATE Backward::Interface)
  # To use the prebuilt library
  target_link_libraries(main PRIVATE Backward::Backward)

(untested)

[endingly]

Actually, prior to this PR, Backward had always joined the build system in the form of header only. However, in the current PR, it is added to the compilation in the form of a library.

[endingly]

now, add version-date format and a usage file

[JonLiu1993]

Usage tested successfully by backward-cpp:x64-windows:

backward-cpp provides CMake targets:

  find_package(Backward CONFIG REQUIRED)
  # To use the header library
  target_link_libraries(main PRIVATE Backward::Interface)
  # To use the prebuilt library
  target_link_libraries(main PRIVATE Backward::Backward)