feat(droid): add nix-on-droid support and vega host

modules/droid/core/hm.nix

@@ -0,0 +1,32 @@
+{ inputs, config, ... }:
+{
+  flake.modules.droid.core =
+    {
+      hostName,
+      userName,
+      userEmail,
+      ...
+    }:
+    {
+      home-manager = {
+        backupFileExtension = "bak";
+        useGlobalPkgs = true;
+        useUserPackages = true;
+        extraSpecialArgs = {
+          inherit
+            inputs
+            hostName
+            userName
+            userEmail
+            ;
+        };
+
+        config = {
+          imports = [
+            config.flake.modules.homeManager.shell
+            config.flake.modules.homeManager.${hostName}
+          ];
+        };
+      };
+    };
+}

modules/droid/core/nix.nix

@@ -0,0 +1,7 @@
+{
+  flake.modules.droid.core = {
+    nix.extraOptions = ''
+      experimental-features = nix-command flakes
+    '';
+  };
+}