Please add FreeBSD to the list of operating systems where Halide can run

[yurivict]

On your website https://halide-lang.org/

• Operating systems: Linux, Windows, macOS, Android, iOS, Qualcomm QuRT

https://www.freshports.org/lang/halide/

[alexreinking]

We don't have first-party support FreeBSD, unlike the others in that list. We could consider linking to this and other (?) ports in a separate section of the webpage.