Refactor/project structure (#3085)

* refactor project structure

* environment-based default registry

* fix tests

* update build container

* use docker platform for iso build emulation

* simplify compat

* Fix docker platform spec in run-compat.sh

* handle riscv compat

* fix bug with dep error exists attr

* undo removal of sorting

* use qemu for iso stage

---------

Co-authored-by: Mariusz Kogen <k0gen@pm.me>
Co-authored-by: Matt Hill <mattnine@protonmail.com>

container-runtime/update-image-local.sh

@@ -0,0 +1,18 @@
+#!/bin/bash
+
+cd "$(dirname "${BASH_SOURCE[0]}")/.."
+
+USE_TTY=
+if tty -s; then
+  USE_TTY="-it"
+fi
+
+DOCKER_PLATFORM=linux/${ARCH}
+case $ARCH in
+    x86_64)
+        DOCKER_PLATFORM=linux/amd64;;
+    aarch64)
+        DOCKER_PLATFORM=linux/arm64;;
+esac
+
+docker run --rm $USE_TTY --platform=$DOCKER_PLATFORM -eARCH --privileged -v "$(pwd):/root/start-os" start9/build-env /root/start-os/container-runtime/update-image.sh