Please add support for FreeBSD

[mike-pt]

I've been using code-server and bumped into an issue with ripgreg due to the fact that the rg binary was missing.

See: coder/code-server#1907

There's a port in FreeBSD
https://www.freshports.org/textproc/ripgrep/
https://svnweb.freebsd.org/ports/head/textproc/ripgrep/Makefile?revision=542412&view=markup&pathrev=542412