CLI: Improve experience when running qmk setup on FreeBSD. (#8798)

* CLI: Improve experience when running `qmk setup` on FreeBSD.

* Install the `avrdude` package as well.
* Switch to installing python packages w/ `--user` flag.
* Basic getting started sections for FreeBSD.
* Update `util/freebsd_install.sh` for root/non-root branches.

* Add ID to doc section.

Co-Authored-By: skullydazed <skullydazed@users.noreply.github.com>

* Add ID to another docs section.

Co-Authored-By: skullydazed <skullydazed@users.noreply.github.com>

* Use `; then` in script for consistency.

Co-Authored-By: skullydazed <skullydazed@users.noreply.github.com>

* Updated to use sudo in one shot if available.

* Apply suggestions from code review

Co-authored-by: Erovia <Erovia@users.noreply.github.com>

* Style fixes for latest version in master.

* Apply suggestions from code review

Co-authored-by: Ryan <fauxpark@gmail.com>

Co-authored-by: skullydazed <skullydazed@users.noreply.github.com>
Co-authored-by: Erovia <Erovia@users.noreply.github.com>
Co-authored-by: Ryan <fauxpark@gmail.com>

util/freebsd_install.sh

@@ -1,7 +1,5 @@
 #!/bin/sh
-util_dir=$(dirname "$0")
-pkg update
-pkg install -y \
+packages=$(cat <<EOF
 	git \
 	wget \
 	gmake \
@@ -13,9 +11,29 @@ pkg install -y \
 	avr-libc \
 	dfu-programmer \
 	dfu-util \
+	avrdude \
 	arm-none-eabi-gcc \
 	arm-none-eabi-binutils \
 	arm-none-eabi-newlib \
 	diffutils \
 	python3
-pip3 install -r ${util_dir}/../requirements.txt
+EOF
+)
+util_dir=$(dirname "$0")
+if [ $(id -u) = 0 ]; then
+	pkg update
+	pkg install -y ${packages}
+	echo ""
+	echo "Re-run the setup as your normal user to install the qmk python dependencies"
+	exit 1
+else
+	if command -v sudo > /dev/null 2>&1; then
+		sudo pkg update
+		sudp pkg install -y ${packages}
+	else
+		echo "Make sure you run setup as root first to install base OS dependencies..."
+		echo ""
+	fi
+
+	python3 -m pip install --user -r ${util_dir}/../requirements.txt
+fi