[general] further improve immutability of KDE config

feat: add resources directory
feat: update KDE config
refactor: remove unused files

pkgs/default.nix

@@ -2,4 +2,7 @@
 # You can build them using 'nix build .#example'
 pkgs: {
   # example = pkgs.callPackage ./example { };
+  themes = {
+    kde-gruvbox-colors = pkgs.callPackage ./themes/kde-gruvbox-colors.nix { };
+  };
 }

pkgs/themes/kde-gruvbox-colors.nix

@@ -0,0 +1,22 @@
+{ stdenv, fetchFromGitHub }:
+
+stdenv.mkDerivation rec {
+  pname = "kde-gruvbox-colors";
+  version = "1.0.0";
+
+  src = fetchFromGitHub {
+    owner = "jokiller230";
+    repo = pname;
+    rev = "438a23c571e22c1bf416c229afac78ad64e81f17";
+    sha256 = "sha256-5iRfWqqtv+ImDN96PuWaS3nuK8AHjfa4DGc8vCkLi4U=";
+  };
+
+  installPhase = ''
+    runHook preInstall
+
+    mkdir -p $out/share
+    cp -R color-schemes konsole $out/share
+
+    runHook postInstall
+  '';
+}