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/dev/skydrive-lap/sops-conf.nix

@@ -1,8 +0,0 @@
-{ config, lib, ... }:
-{
-  sops = {
-    secrets = {
-      "wireguard/wg0.conf" = { };
-    };
-  };
-}