fix(system): enable uwsm and fix session detection to allow VM login

- Enable programs.uwsm for session management.
- Improve SDDM theme session detection logic to be case-insensitive and more robust.
- Perform a global cleanup of 'Nnomarchy' and 'org.nnomarchy' typos across all scripts and configurations.

bin/appearance/nomarchy-theme-bg-set

@@ -3,12 +3,12 @@
 # Sets the specified image as the current background
 
 if [[ -z $1 ]]; then
-  echo "Usage: nnomarchy-theme-bg-set <path-to-image>" >&2
+  echo "Usage: nomarchy-theme-bg-set <path-to-image>" >&2
   exit 1
 fi
 
 BACKGROUND="$1"
-CURRENT_BACKGROUND_LINK="$HOME/.config/nnomarchy/current/background"
+CURRENT_BACKGROUND_LINK="$HOME/.config/nomarchy/current/background"
 
 # Create symlink to the new background
 ln -nsf "$BACKGROUND" "$CURRENT_BACKGROUND_LINK"