Feature/multi platform (#1866)

* wip

* wip

* wip

* wip

* wip

* wip

* remove debian dir

* lazy env and git hash

* remove env and git hash on clean

* don't leave project dir

* use docker for native builds

* start9 rust

* correctly mount registry

* remove systemd config

* switch to /usr/bin

* disable sound for now

* wip

* change disk list

* multi-arch images

* multi-arch system images

* default aarch64

* edition 2021

* dynamic wifi interface name

* use wifi interface from config

* bugfixes

* add beep based sound

* wip

* wip

* wip

* separate out raspberry pi specific files

* fixes

* use new initramfs always

* switch journald conf to sed script

* fixes

* fix permissions

* talking about kernel modules not scripts

* fix

* fix

* switch to MBR

* install to /usr/lib

* fixes

* fixes

* fixes

* fixes

* add media config to cfg path

* fixes

* fixes

* fixes

* raspi image fixes

* fix test

* fix workflow

* sync boot partition

* gahhhhh

build/lib/motd

@@ -0,0 +1,18 @@
+#!/bin/sh
+printf "\n"
+printf "Welcome to\n"
+cat << "ASCII"
+          |                        ,---.,---.
+,---.,-.-.|---.,---.,---.,---.,   .|   |`---.
+|---'| | ||   |,---|`---.`---.|   ||   |    |
+`---'` ' '`---'`---^`---'`---'`---|`---'`---'
+                              `---'
+ASCII
+printf "   %s (%s %s)\n" "$(uname -o)" "$(uname -r)" "$(uname -m)"
+printf "   $(embassy-cli --version | sed 's/Embassy CLI /embassyOS v/g') - $(embassy-cli git-info)\n"
+
+printf "\n"
+printf " * Documentation:  https://start9.com\n"
+printf " * Management:     https://%s.local\n" "$(hostname)"
+printf " * Support:        https://t.me/start9_labs\n"
+printf "\n"