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/startd.service

@@ -0,0 +1,16 @@
+[Unit]
+Description=StartOS Daemon
+
+[Service]
+Type=simple
+Environment=RUST_LOG=startos=debug,patch_db=warn
+ExecStart=/usr/bin/startd
+Restart=always
+RestartSec=3
+ManagedOOMPreference=avoid
+CPUAccounting=true
+CPUWeight=1000
+LimitNOFILE=65536
+
+[Install]
+WantedBy=multi-user.target