refactor: flake dir -> outputs/sys -> nixos

flake.nix

@@ -11,8 +11,8 @@
       ];
 
       imports = [
-        ./flake/pkgs
-        ./flake/nixos.nix
+        ./outputs/pkgs
+        ./outputs/nixos.nix
       ];
 
       # flake = {

home/default.nix

@@ -0,0 +1,7 @@
+{
+  imports = [
+    ./modules
+    ./profiles
+    ./roles
+  ];
+}