[fff] Add new port

[salman-javed-nz]

• 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.

[salman-javed-nz]

@microsoft-github-policy-service agree

[salman-javed-nz]

Regarding PR checklist item "The name of the port matches an existing name for this component on https://repology.org", the name fff is also the name of a file manager written in Bash script.

I am not sure whether this is a genuine name clash, because I don't imagine the file manager fff is something one would want to pull with vcpkg. The most popular C project named fff on GitHub, going by the number of stars and forks, is the library in this PR.

In fact, on Conan Center, the library in this PR is named fff (https://conan.io/center/recipes/fff).

[JavierMatosD]

Hi @salman-javed-nz, thank you for the contribution!

Do you mind changing the name of this port to meekrosoft-fff to disambiguate from other packages with the same name? I see there are multiple hits for fff on repology

[JavierMatosD]

Suggested change

	# Header-only library
	set(VCPKG_BUILD_TYPE release) # Header-only library

[salman-javed-nz]

Both review comments addressed.