build: add freebsd support

docs/getting_started.md

@@ -8,7 +8,7 @@ and release artifacts may be missing when merging changes on a faster cadence.
 
 ## Binaries
 
-Binaries of Sunshine are created for each release. They are available for Linux, macOS, and Windows.
+Binaries of Sunshine are created for each release. They are available for FreeBSD, Linux, macOS, and Windows.
 Binaries can be found in the [latest release][latest-release].
 
 > [!NOTE]
@@ -28,7 +28,27 @@ and [ghcr.io](https://github.com/orgs/LizardByte/packages?repo_name=sunshine).
 
 See [Docker](../DOCKER_README.md) for more information.
 
+### FreeBSD
+
+#### Install
+1. Download the appropriate package for your architecture
+
+   | Architecture  | Package                                                                                                                                |
+   |---------------|----------------------------------------------------------------------------------------------------------------------------------------|
+   | amd64/x86_64  | [Sunshine-FreeBSD-14.3-amd64.pkg](https://github.com/LizardByte/Sunshine/releases/latest/download/Sunshine-FreeBSD-14.3-amd64.pkg)     |
+   | arm64/aarch64 | [Sunshine-FreeBSD-14.3-aarch64.pkg](https://github.com/LizardByte/Sunshine/releases/latest/download/Sunshine-FreeBSD-14.3-aarch64.pkg) |
+
+2. Open terminal and run the following command.
+   ```sh
+   sudo pkg install ./Sunshine-FreeBSD-14.3-{arch}.pkg
+   ```
+##### Uninstall
+```sh
+sudo pkg delete Sunshine
+```
+
 ### Linux
+
 **CUDA Compatibility**
 
 CUDA is used for NVFBC capture.
@@ -522,6 +542,12 @@ All shortcuts start with `Ctrl+Alt+Shift`, just like Moonlight.
 * The "Desktop" app works the same as any other application except it has no commands. It does not start an application,
   instead it simply starts a stream. If you removed it and would like to get it back, just add a new application with
   the name "Desktop" and "desktop.png" as the image path.
+* The FreeBSD version of Sunshine is missing some features that are present on Linux.
+  The following are known limitations.
+
+  * Only X11 and Wayland capture are supported
+  * DualSense5 emulation is limited due to missing uhid features
+
 * For the Linux flatpak you must prepend commands with `flatpak-spawn --host`.
 * If inputs (mouse, keyboard, gamepads...) aren't working after connecting, add the user running sunshine to the `input` group.