Migrated desktop environment from XFCE to KDE Plasma with simplified profiles.

- Replaced XFCE with KDE Plasma and SDDM display manager.
- Reduced profiles from seven to four (minimal, server, basic, office).
- Split home skeleton files into home-skel and home-skel-desktop directories.
- Added display name prompt during user setup.
- Added 7zip and fwupd to base packages.

files/home-skel-desktop/.local/share/applications/assistant.desktop

@@ -0,0 +1,2 @@
+[Desktop Entry]
+NoDisplay=true

files/home-skel-desktop/.local/share/applications/avahi-discover.desktop

@@ -0,0 +1,2 @@
+[Desktop Entry]
+NoDisplay=true

files/home-skel-desktop/.local/share/applications/bssh.desktop

@@ -0,0 +1,2 @@
+[Desktop Entry]
+NoDisplay=true

files/home-skel-desktop/.local/share/applications/bvnc.desktop

@@ -0,0 +1,2 @@
+[Desktop Entry]
+NoDisplay=true

files/home-skel-desktop/.local/share/applications/designer.desktop

@@ -0,0 +1,2 @@
+[Desktop Entry]
+NoDisplay=true

files/home-skel-desktop/.local/share/applications/linguist.desktop

@@ -0,0 +1,2 @@
+[Desktop Entry]
+NoDisplay=true

files/home-skel-desktop/.local/share/applications/lstopo.desktop

@@ -0,0 +1,2 @@
+[Desktop Entry]
+NoDisplay=true

files/home-skel-desktop/.local/share/applications/mpv.desktop

@@ -0,0 +1,2 @@
+[Desktop Entry]
+NoDisplay=true

files/home-skel-desktop/.local/share/applications/qdbusviewer.desktop

@@ -0,0 +1,2 @@
+[Desktop Entry]
+NoDisplay=true

files/home-skel-desktop/.local/share/applications/qv4l2.desktop

@@ -0,0 +1,2 @@
+[Desktop Entry]
+NoDisplay=true

files/home-skel-desktop/.local/share/applications/qvidcap.desktop

@@ -0,0 +1,2 @@
+[Desktop Entry]
+NoDisplay=true