[libsbml] New port for libsbml

[CiaranWelsh]

Describe the pull request
This PR has a port for libsbml, a library for creating models in systems biology. This port was mostly built by JackBoosY (See issue #12558 on microsoft/vcpkg) with some minor additions for the libsbml "namespace" option.

Note, only the commits made in September bear any relevance, since they replaced earlier attempts at creating the lisbml port.

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

I've tested on windows, ubuntu and mac. No I haven't updated the CI baseline.

• Does your PR follow the maintainer guide?

To the best of my knowledge, yes.

Closes #12558

[ghost]

All CLA requirements met.

[Hoikas]

#13488 will soon be deprecating CONTROL files in favor of manifests. Perhaps this should use a manifest instead of a CONTROL file?

[JackBoosY]

/azp run

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).

[JackBoosY]

Manually tested features on x86-windows.

[BillyONeal]

Thanks for your contribution!