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>

build/env/check-version.sh

@@ -0,0 +1,15 @@
+#!/bin/bash
+
+cd "$(dirname "${BASH_SOURCE[0]}")"
+
+FE_VERSION="$(cat ../../web/package.json | grep '"version"' | sed 's/[ \t]*"version":[ \t]*"\([^"]*\)",/\1/')"
+
+# TODO: Validate other version sources - backend/Cargo.toml, backend/src/version/mod.rs
+
+VERSION=$FE_VERSION
+
+if ! [ -f ./VERSION.txt ] || [ "$(cat ./VERSION.txt)" != "$VERSION" ]; then
+    echo -n "$VERSION" > ./VERSION.txt
+fi
+
+echo -n ./build/env/VERSION.txt