[libsercomm] Adding new port

[misirlou-tg]

Adds a new port, libsercomm

• What does your PR fix?

  Fixes [New Port Request] libsercomm #21003

• Which triplets are supported/not supported? Have you updated the CI baseline?

  all, Yes

• Does your PR follow the maintainer guide?

  Yes

• If you have added/updated a port: Have you run ./vcpkg x-add-version --all and committed the result?

  Yes

If you are still working on the PR, open it as a Draft: https://github.blog/2019-02-14-introducing-draft-pull-requests/

[github-actions]

You have modified or added at least one portfile where deprecated functions are used.

If you feel able to do so, please consider migrating them to the new functions:
vcpkg_install_cmake -> vcpkg_cmake_install (from port vcpkg-cmake)
vcpkg_build_cmake -> vcpkg_cmake_build (from port vcpkg-cmake)
vcpkg_configure_cmake -> vcpkg_cmake_configure (Please remove the option PREFER_NINJA) (from port vcpkg-cmake)
vcpkg_fixup_cmake_targets -> vcpkg_cmake_config_fixup (from port vcpkg-cmake-config)

In the ports that use the new function, you have to add the corresponding dependencies:

{
  "name": "vcpkg-cmake",
  "host": true
},
{
  "name": "vcpkg-cmake-config",
  "host": true
}

The following files are affected:

• ports/libsercomm/portfile.cmake

[JonLiu1993]

All features are tested successfully in the following triplet:

• x86-windows
• x64-windows
• x64-windows-static
• x64-linux

[NangiDev]

Thank you so much!
Great work!

What would be needed to do to get the osX triplet working?
Also other triplets if that's possible.

[GongT]

I can't use this package.

It install libsercomm/sercommConfig.cmake, but find_package want ether libsercomm/libsercommConfig.cmake or sercomm/sercommConfig.cmake

[cmake] CMake Error at vcpkg/scripts/buildsystems/vcpkg.cmake:800 (_find_package):
[cmake]   Could not find a package configuration file provided by "sercomm" with any
[cmake]   of the following names:
[cmake] 
[cmake]     sercommConfig.cmake
[cmake]     sercomm-config.cmake
[cmake] 
[cmake]   Add the installation prefix of "sercomm" to CMAKE_PREFIX_PATH or set
[cmake]   "sercomm_DIR" to a directory containing one of the above files.  If
[cmake]   "sercomm" provides a separate development package or SDK, be sure it has
[cmake]   been installed.
[cmake] Call Stack (most recent call first):
[cmake]   CMakeLists.txt:49 (find_package)

[JonLiu1993]

@GongT ,Please post a new issue to describle your question, and we will track your question in your issue