Add missing packages for SonicDE: KDE Gear 26.04.3, KF6 6.29.0, and support packages.

Also adds manually built Plasma 6.7.4 packages (plasma-systemsettings,
plasma-keyboard/kcm, plasma-print-manager, flatpak-kcm, sddm, sddm-kcm,
kdebugsettings) and provides plasma-desktop-doc from sonic-desktop-interface-doc.

Build-order regenerated.

Generated with [Devin](https://devin.ai)

Co-Authored-By: Devin <158243242+devin-ai-integration[bot]@users.noreply.github.com>

kde-filesystem/macros.kde4

@@ -0,0 +1,32 @@
+
+%_kde4_version %((kde4-config --kde-version 2>/dev/null || echo 4.3.98) | cut -d' ' -f1 )
+#_kde4_version %((kde4-config --version 2>/dev/null || echo "KDE: 4.3.98") | grep '^KDE' | sed -e 's/KDE[^:]*:[ ]*//g' | cut -d' ' -f1)
+
+# api = 2
+# initial try, including only items that vary from defaults
+#
+
+%_kde4_build_tests -DKDE4_BUILD_TESTS:BOOL=OFF
+
+%cmake_kde4 \
+  QTDIR="%{_qt4_prefix}" ; export QTDIR ; \
+  PATH="%{_qt4_bindir}:$PATH" ; export PATH ; \
+  CFLAGS="${CFLAGS:-%optflags}" ; export CFLAGS ; \
+  CXXFLAGS="${CXXFLAGS:-%optflags}" ; export CXXFLAGS ; \
+  FFLAGS="${FFLAGS:-%optflags%{?_fmoddir: -I%_fmoddir}}" ; export FFLAGS ; \
+  %{?__global_ldflags:LDFLAGS="${LDFLAGS:-%__global_ldflags}" ; export LDFLAGS ;} \
+  %{__cmake} \\\
+    -DBUILD_SHARED_LIBS:BOOL=ON \\\
+    -DCMAKE_BUILD_TYPE=%{_kde4_buildtype} \\\
+    -DCMAKE_INSTALL_PREFIX:PATH=%{_kde4_prefix} \\\
+    -DCMAKE_USE_RELATIVE_PATHS:BOOL=ON \\\
+    -DCMAKE_VERBOSE_MAKEFILE:BOOL=ON \\\
+    -DDATA_INSTALL_DIR:PATH=%{_kde4_appsdir} \\\
+    -DINCLUDE_INSTALL_DIR:PATH=%{_kde4_includedir} \\\
+    -DLIB_INSTALL_DIR:PATH=%{_kde4_libdir} \\\
+    %{?_kde4_build_tests} \\\
+%if "%{?_lib}" == "lib64" \
+     %{?_cmake_lib_suffix64} \\\
+%endif \
+    -DLIBEXEC_INSTALL_DIR:PATH=%{_kde4_libexecdir} \\\
+    -DSYSCONF_INSTALL_DIR:PATH=%{_kde4_sysconfdir}