ISO Build Doc Updates

Here's some feedback on what I found to work while building the ISO. Maybe there are newer instructions, or maybe my method was incorrect, or maybe the docs could use an update...

Setup is FreeBSD 13.2 installed in a Boxes VM on a Linux host.

1) Extremely easy to figure out how to get all this working based on docs available and scripts provided
2) The FreeBSD VM qcow2 filesystem is too small
3) Building the Live ISO
https://hellosystem.github.io/docs/developer/building.html
sha is not a package on FreeBSD 13.2
pkg install -y pkg git-lite zsync wget bash zip devel/py-xdg librsvg2 ca_root_nss sudo git zenity
4) You need to edit loader.conf before building the ISO
vi + overlays/boot/boot/loader.conf
uftdi_load="YES"
boot_multicons="YES"
boot_serial="YES"
comconsole_speed="115200"
console="comconsole,efi"
5) zenity package not found doing the build needs to be part of Building the Live ISO
Installing furybsd-wifi-tool-0...
pkg: Missing dependency 'zenity'
see pkg install on item #3
5a) edit overlays/uzip/furybsd-wifi-tool/manifest and remove x11/zenity and put zenity since x11/zenity is not a package on 13.2
5b) edit overlays/uzip/furybsd-xorg-tool/manifest and remove x11/zenity and put zenity since x11/zenity is not a package on 13.2
5c) edit settings/packages.hello adding x11/zenity
6) Comment out xcb-util-cursor in settings/packages.hello
7) sudo su
8) export QT_QPA_PLATFORM=offscreen ./build.sh hello
9) Turns out modules get removed from the builder script and don't work
vi ./settings/rc.conf.common
kld_list="fusefs cuse ig4 iicbus iichid utouch asmc if_urndis if_cdce if_ipheth usb ucom uftdi"

**Without step 7 error**
```
freebsd-vm ~/Source/helloSystem_ISO]$ ./build.sh hello
Host system version: 13.2-RELEASE
This script must be run as root
```

**Step 8 and 9 core dump without the export**
```
extracting: LICENSE.txt   
extracting: install-linux.txt   
extracting: install-mac.txt   
extracting: install-win.txt   
+ mv 'Inter Desktop/Inter-V.ttf' /usr/local/furybsd/uzip/usr/local/share/fonts/TTF/
+ rm -rf 'Inter *'
+ mkdir -p /usr/local/furybsd/uzip/Applications
+ chmod g+w /usr/local/furybsd/uzip/Applications
+ chroot /usr/local/furybsd/uzip /usr/local/bin/desktop2app /usr/local/share/applications/featherpad.desktop /Applications/
qt.qpa.xcb: could not connect to display  
qt.qpa.plugin: Could not load the Qt platform plugin "xcb" in "" even though it was found.
This application failed to start because no Qt platform plugin could be initialized. Reinstalling the application may fix this pro
blem.

Available platform plugins are: bsdfb, minimal, offscreen, vnc, wayland-egl, wayland, wayland-xcomposite-egl, wayland-xcomposite-g
lx, xcb.

Abort trap (core dumped)
```

**Original discussion here:**
https://github.com/helloSystem/ISO/issues/505#issuecomment-1704058166