[ucoro] add new port

[miyanyan]

• 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.

[dg0yt]

Do you plan to upstream the patch?

[dg0yt]

• There should be NAMESPACE ...:: here.
• If the CMake config isn't provided by upstream, vcpkg ask for the prefix "unofficial".

Suggested change

	+# generate config.cmake
	+install(
	+ EXPORT ucoroTargets
	+ FILE ucoro-config.cmake
	+ DESTINATION "share/ucoro"
	+)
	+install(
	+ EXPORT ucoroTargets
	+ FILE unofficial-ucoro-config.cmake
	+ NAMESPACE unofficial::ucoro::
	+ DESTINATION "share/unofficial-ucoro"
	+)

[dg0yt]

To complement the previous suggestion:

Suggested change

	vcpkg_cmake_config_fixup()
	vcpkg_cmake_config_fixup(PACKAGE_NAME unofficial-ucoro)

[miyanyan]

Do you plan to upstream the patch?

yes, the author knows this so let me add the namespace ucoro::