update: system update & refactor

# Breaking Changes
- sops location movod to "system/dev/<dev-name>/sops/sops-conf.nix"
- flake devices declaration changes
- whole flake update

system/modules/virtualization.nix

@@ -4,13 +4,6 @@
 {
   virtualisation = {
     docker.enable = true;
-
-    # Run container as systemd service
-    oci-containers = {
-      backend = "podman";
-      containers = { };
-    };
-
     spiceUSBRedirection.enable = true;
   };
 }