kdeFrameworks: fixup inputs and outputs

- Reduce environment pollution with a separate $bin output containing programs,
  plugins, and shared data. Libraries remain in $out and are not installed into
  the environment.
- Only propagate build inputs as required.

pkgs/development/libraries/kde-frameworks/kparts.nix

@@ -1,14 +1,17 @@
-{ mkDerivation, lib, extra-cmake-modules, kconfig, kcoreaddons
-, ki18n, kiconthemes, kio, kjobwidgets, knotifications, kservice
-, ktextwidgets, kwidgetsaddons, kxmlgui
+{
+  mkDerivation, lib,
+  extra-cmake-modules,
+  kconfig, kcoreaddons, ki18n, kiconthemes, kio, kjobwidgets, knotifications,
+  kservice, ktextwidgets, kwidgetsaddons, kxmlgui
 }:
 
 mkDerivation {
   name = "kparts";
   meta = { maintainers = [ lib.maintainers.ttuegel ]; };
   nativeBuildInputs = [ extra-cmake-modules ];
-  propagatedBuildInputs = [
-    kconfig kcoreaddons ki18n kiconthemes kio kjobwidgets knotifications
-    kservice ktextwidgets kwidgetsaddons kxmlgui
+  buildInputs = [
+    kconfig kcoreaddons ki18n kiconthemes kjobwidgets knotifications kservice
+    kwidgetsaddons
   ];
+  propagatedBuildInputs = [ kio ktextwidgets kxmlgui ];
 }