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>

plasma-systemsettings/plasma-systemsettings.spec

@@ -0,0 +1,102 @@
+%global  base_name systemsettings
+
+Name:    plasma-%{base_name}
+Summary: KDE System Settings application
+Version:        6.7.4
+Release:        2%{?dist}
+
+License: BSD-2-Clause AND CC0-1.0 AND GPL-2.0-only AND GPL-2.0-or-later AND GPL-3.0-only AND LGPL-2.0-only AND LGPL-2.1-or-later AND (GPL-2.0-only OR GPL-3.0-only)
+URL:     https://invent.kde.org/plasma/%{base_name}
+
+Source0: https://download.kde.org/%{stable_kf6}/plasma/%{version}/%{base_name}-%{version}.tar.xz
+Source1: https://download.kde.org/%{stable_kf6}/plasma/%{version}/%{base_name}-%{version}.tar.xz.sig
+
+# https://fedoraproject.org/wiki/Changes/EncourageI686LeafRemoval
+ExcludeArch: %{ix86}
+
+BuildRequires: desktop-file-utils
+
+BuildRequires: sonic-frameworks-cmake-modules
+BuildRequires: sonic-rpm-macros
+BuildRequires: cmake(KF6Auth)
+BuildRequires: cmake(KF6Crash)
+BuildRequires: cmake(KF6ItemViews)
+BuildRequires: cmake(KF6KCMUtils)
+BuildRequires: cmake(KF6I18n)
+BuildRequires: cmake(KF6KIO)
+BuildRequires: cmake(KF6Service)
+BuildRequires: cmake(KF6IconThemes)
+BuildRequires: cmake(KF6WidgetsAddons)
+BuildRequires: cmake(KF6WindowSystem)
+BuildRequires: cmake(KF6XmlGui)
+BuildRequires: cmake(KF6DBusAddons)
+BuildRequires: cmake(KF6Config)
+BuildRequires: cmake(KF6DocTools)
+BuildRequires: cmake(KF6ItemModels)
+BuildRequires: cmake(KF6GuiAddons)
+BuildRequires: cmake(KF6Runner)
+BuildRequires: cmake(KF6ColorScheme)
+BuildRequires: cmake(KF6JobWidgets)
+
+BuildRequires: cmake(Qt6Qml)
+BuildRequires: cmake(Qt6Quick)
+BuildRequires: cmake(Qt6QuickWidgets)
+BuildRequires: cmake(Qt6Widgets)
+
+BuildRequires: cmake(PlasmaActivities)
+
+BuildRequires: cmake(KF6Kirigami2)
+Requires:      kf6-kirigami2%{?_isa}
+
+# https://bugzilla.redhat.com/show_bug.cgi?id=1268493
+# doc/HTML/en/systemsettings conflicts
+Conflicts: kde-workspace < 5.0
+
+# /usr/share/kservices5/settings-system-administration.desktop file conflict
+Conflicts: kcm_systemd < 1.2.1-15
+
+Provides:  plasma-systemsettings-devel = %{version}-%{release}
+Obsoletes: plasma-systemsettings-devel < 5.20.90
+
+%description
+%{summary}.
+
+
+%prep
+%autosetup -n %{base_name}-%{version} -p1
+
+
+%build
+%cmake_kf6
+%cmake_build
+
+
+%install
+%cmake_install
+
+%find_lang systemsettings6 --with-qt --with-html --all-name
+
+
+%check
+desktop-file-validate %{buildroot}%{_datadir}/applications/kdesystemsettings.desktop
+desktop-file-validate %{buildroot}%{_datadir}/applications/systemsettings.desktop
+
+
+%files -f systemsettings6.lang
+%license LICENSES/*
+%{_bindir}/systemsettings
+%{_datadir}/systemsettings/
+%{_datadir}/applications/kdesystemsettings.desktop
+%{_datadir}/applications/systemsettings.desktop
+%{_datadir}/metainfo/org.kde.systemsettings.metainfo.xml
+%{_datadir}/zsh/site-functions/_systemsettings
+%{_kf6_datadir}/kglobalaccel/systemsettings.desktop
+%{_kf6_datadir}/qlogging-categories6/systemsettings.categories
+%{_kf6_plugindir}/krunner/krunner_systemsettings.so
+
+%changelog
+* Fri Aug 28 2026 Anders da Silva Rytter Hansen <andersrh@users.noreply.github.com> - 6.7.4-2
+- SonicDE build for Enterprise Linux 10
+
+* Fri Apr 10 2026 Steve Cossette <farchord@gmail.com> - 6.6.4-1
+- 6.6.4