Add EPEL apps at latest versions and fix all EPEL dependency conflicts

Add 8 new packages built from upstream KDE sources at versions matching
the rest of SonicDE (Gear 26.04.3, Plasma 6.7.4):
- colord-kde 26.04.3
- dolphin-plugins 26.04.3
- filelight 26.04.3
- kde-gtk-config 6.7.4
- kde-inotify-survey 26.04.3
- ksanecore 26.04.3 (dependency for skanpage)
- plasma-discover 6.7.4 (with snap backend disabled)
- skanpage 26.04.3

These packages replace the EPEL versions and use SonicDE dependencies
instead of kf6-*/plasma-* packages, ensuring they are upgraded (not
removed) when SonicDE is installed alongside EPEL KDE.

Fix EPEL dependencies in existing SonicDE packages that caused packages
to be removed during dnf upgrade --allowerasing:
- sonic-desktop-interface: kde-cli-tools -> sonic-terminal-tools,
  kmenuedit -> sonic-launcher-menu-edit, kwrited -> sonic-write-daemon,
  signon-plugin-oauth2 and plasma-systemsettings changed to Recommends
- sonic-workspace: kio-fuse -> sonic-frameworks-io-fuse,
  polkit-kde -> sonic-polkit-agent,
  xdg-desktop-portal-kde -> xdg-desktop-portal-sonicde,
  plasma-keyboard and kde-settings-plasma changed to Recommends
- sonic-workspace-addons: kf6-plasma -> sonic-interface-libraries
- kde-gtk-config: breeze-gtk-common -> sonic-silver-gtk-common
- sonic-login-manager: kde-settings-plasma changed to Recommends
- kcm-soniclogin: plasma-systemsettings changed to Recommends
- sonic-rpm-macros: kde-qdoc-common changed to Recommends
- sonic-welcome-center: add Obsoletes for plasma-welcome

Also includes Obsoletes/Provides fixes across all spec files for proper
EPEL package replacement, and Conflicts tag removal from spec files.

Result: dnf upgrade --allowerasing from standard EPEL KDE removes 0
packages. dnf install of SonicDE packages installs 195 packages with
0 removals.

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

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

sonic-silver-theme/sonic-silver-theme.spec

@@ -3,7 +3,7 @@
 
 Name:		sonic-silver-theme
 Version:	6.7.4.2
-Release:	1%{?dist}
+Release:        2%{?dist}
 Summary:	Silver widget style, window decoration and theme for SonicDE
 URL:		https://github.com/Sonic-DE/%{reponame}
 Source0:	%{url}/archive/refs/tags/%{version}.tar.gz#/%{reponame}-%{version}.tar.gz
@@ -36,9 +36,7 @@ BuildRequires:	cmake(KF6WindowSystem)
 
 # SonicDE replaces the Plasma Breeze theme packages.
 Provides:	breeze = %{version}-%{release}
-Conflicts:	breeze < %{version}-%{release}
 Provides:	breeze-cursor-theme = %{version}-%{release}
-Conflicts:	breeze-cursor-theme < %{version}-%{release}
 
 %description
 Silver is the default widget style, window decoration, color scheme, cursor
@@ -49,7 +47,6 @@ the Breeze theme of KDE Plasma.
 Summary:	Development files for %{name}
 Requires:	%{name}%{?_isa} = %{version}-%{release}
 Provides:	breeze-devel%{?_isa} = %{version}-%{release}
-Conflicts:	breeze-devel < %{version}-%{release}
 
 %description devel
 This package contains the CMake configuration and header files needed to