refactor: massively overhaul home manager module system

reference/hosts/callisto/default.nix

@@ -0,0 +1,45 @@
+{
+  inputs,
+  system,
+  ...
+}:
+{
+  imports =
+    [
+      ./configuration.nix
+      ../../modules/linux/audio
+      ../../modules/linux/networking
+      ../../modules/linux/fonts
+      ../../modules/linux/greeter
+      ../../modules/linux/core
+      ../../modules/linux/desktop-environment
+      ../../modules/linux/stylix
+      ../../overlays
+      {
+        home-manager.useGlobalPkgs = true;
+        home-manager.useUserPackages = true;
+        home-manager.backupFileExtension = "backup";
+        home-manager.extraSpecialArgs = {
+          inherit inputs;
+          inherit system;
+        };
+        home-manager.users.youwen = {
+          imports =
+            [
+              ../../users/youwen/common
+              ../../users/youwen/linux/laptop
+              ../../users/youwen/linux/packages/aarch-64
+              (import ../../users/youwen/common/fastfetch { })
+              ./home-manager-extras
+            ]
+            ++ (with inputs; [
+              nix-index-database.hmModules.nix-index
+            ]);
+        };
+      }
+    ]
+    ++ (with inputs; [
+      home-manager.nixosModules.home-manager
+      apple-silicon.nixosModules.apple-silicon-support
+    ]);
+}