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

modules/hosts/vega/default.nix

@@ -0,0 +1,41 @@
+{
+  inputs,
+  outputs,
+  config,
+  ...
+}:
+let
+  hostName = "vega";
+  userName = "nix-on-droid";
+  userEmail = "t@tux.rs";
+  system = "aarch64-linux";
+  unstable = true;
+  nixpkgs = if unstable then inputs.nixpkgs else inputs.nixpkgs-stable;
+in
+{
+  flake.nixOnDroidConfigurations."${hostName}" = inputs.nix-on-droid.lib.nixOnDroidConfiguration {
+    pkgs = import nixpkgs {
+      system = system;
+      config = {
+        allowUnfree = true;
+        joypixels.acceptLicense = true;
+      };
+      overlays = builtins.attrValues inputs.self.overlays;
+    };
+    extraSpecialArgs = {
+      inherit
+        inputs
+        outputs
+        hostName
+        userName
+        userEmail
+        ;
+    };
+
+    modules = [
+      config.flake.modules.droid.core
+      config.flake.modules.droid.networking
+      config.flake.modules.droid.${hostName}
+    ];
+  };
+}