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>

core/src/volume.rs

@@ -0,0 +1,35 @@
+use std::path::{Path, PathBuf};
+
+use crate::PackageId;
+pub use crate::VolumeId;
+use crate::prelude::*;
+use crate::util::VersionString;
+
+pub const PKG_VOLUME_DIR: &str = "package-data/volumes";
+pub const BACKUP_DIR: &str = "/media/startos/backups";
+
+pub fn data_dir<P: AsRef<Path>>(datadir: P, pkg_id: &PackageId, volume_id: &VolumeId) -> PathBuf {
+    datadir
+        .as_ref()
+        .join(PKG_VOLUME_DIR)
+        .join(pkg_id)
+        .join("data")
+        .join(volume_id)
+}
+
+pub fn asset_dir<P: AsRef<Path>>(
+    datadir: P,
+    pkg_id: &PackageId,
+    version: &VersionString,
+) -> PathBuf {
+    datadir
+        .as_ref()
+        .join(PKG_VOLUME_DIR)
+        .join(pkg_id)
+        .join("assets")
+        .join(version.as_str())
+}
+
+pub fn backup_dir(pkg_id: &PackageId) -> PathBuf {
+    Path::new(BACKUP_DIR).join(pkg_id).join("data")
+}