feat: add graphical interface with relm4 and libadw

package.nix

@@ -3,6 +3,9 @@
   lib,
   craneLib,
   mold-wrapped,
+  libadwaita,
+  pkg-config,
+  wrapGAppsHook4,
 }:
 let
   cargoToml = lib.importTOML ./Cargo.toml;
@@ -14,7 +17,13 @@ craneLib.buildPackage {
 
   src = craneLib.cleanCargoSource ./.;
 
-  nativeBuildInputs = [ mold-wrapped ];
+  nativeBuildInputs = [
+    mold-wrapped
+    pkg-config
+    wrapGAppsHook4
+  ];
+
+  buildInputs = [ libadwaita ];
 
   RUSTFLAGS = "-C link-arg=-fuse-ld=mold";