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/kpeople.nix

@@ -1,12 +1,16 @@
-{ mkDerivation, lib, extra-cmake-modules, kcoreaddons, ki18n
-, kitemviews, kservice, kwidgetsaddons, qtdeclarative
+{
+  mkDerivation, lib,
+  extra-cmake-modules,
+  kcoreaddons, ki18n, kitemviews, kservice, kwidgetsaddons, qtbase,
+  qtdeclarative,
 }:
 
 mkDerivation {
   name = "kpeople";
   meta = { maintainers = [ lib.maintainers.ttuegel ]; };
   nativeBuildInputs = [ extra-cmake-modules ];
-  propagatedBuildInputs = [
+  buildInputs = [
     kcoreaddons ki18n kitemviews kservice kwidgetsaddons qtdeclarative
   ];
+  propagatedBuildInputs = [ qtbase ];
 }