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>

sddm/sddm-rpmostree-tmpfiles-hack.patch

@@ -0,0 +1,12 @@
+diff --git a/services/sddm-tmpfiles.conf.in b/services/sddm-tmpfiles.conf.in
+index fb45553..6acfb6c 100644
+--- a/services/sddm-tmpfiles.conf.in
++++ b/services/sddm-tmpfiles.conf.in
+@@ -1,5 +1,7 @@
+ # Home dir of the sddm user, also contains state.conf
+ d	${STATE_DIR}	0750	sddm	sddm
++# Workaround for https://pagure.io/fedora-kde/SIG/issue/87
++Z	${STATE_DIR}	-	sddm	sddm
+ # This contains X11 auth files passed to Xorg and the greeter
+ d	${RUNTIME_DIR}	0711	root	root
+ # Sockets for IPC