message: Add FreeBSD installation instructions for CMake
diff: @@ -70,6 +70,7 @@ Please select your operating system:
  - [macOS](#macos)
  - [Debian-based Linuxes](#debian-based-linuxes)
  +- [FreeBSD](#freebsd)
  - [Microsoft Windows](#windows-msvc)
  #### macOS
  @@ -92,6 +93,12 @@ sudo port install cmake
  sudo apt install cmake
  ```
  +#### FreeBSD
  +
  +```sh
  +pkg install cmake
  +```
  +
  #### Windows (MSVC)
  Windows support is _highly experimental_. Only simple Wasm programs may be run, and no syscalls are allowed. This means
  