Add fast-obj library

[VictorGordan]

• 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.

[VictorGordan]

@VictorGordan please read the following Contributor License Agreement(CLA). If you agree with the CLA, please reply with the following information.

@microsoft-github-policy-service agree [company="{your company}"]

Options:

• (default - no company specified) I have sole ownership of intellectual property rights to my Submissions and I am not making Submissions in the course of work for my employer.

@microsoft-github-policy-service agree

• (when company given) I am making Submissions in the course of work for my employer (or my employer has intellectual property rights in my Submissions by contract or applicable law). I have permission from my employer to make Submissions and enter into this Agreement on behalf of my employer. By signing below, the defined term “You” includes me and my employer.

@microsoft-github-policy-service agree company="Microsoft"

Contributor License Agreement

@microsoft-github-policy-service agree

[BillyONeal]

The one they already have seems reasonable, why did we need to replace the build system?

This should probably be turned into a PR editing https://github.com/thisistherk/fast_obj/blob/master/CMakeLists.txt

[VictorGordan]

I wasn't able to get their CMakeLists.txt working with vcpkg (I have to admit I'm not the most knowledgeable when it comes to CMake), and I would like to avoid doing a PR on their repo because they haven't had any activity in 8 months on GH, and they have 3 PRs open for months in the fast_obj repo.

[BillyONeal]

This appears identical to the generated ones so we shouldn't add it.

[VictorGordan]

I didn't know the text auto generates something. I suggest editing the instructions in Step 4 here to make it more clear for people in the future. I will remove the text