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/system/nomarchy-tz-select

@@ -1,6 +1,6 @@
 #!/usr/bin/env bash
 
-# Select system timezone declaratively for Nnomarchy NixOS.
+# Select system timezone declaratively for Nomarchy NixOS.
 
 STATE_FILE="/etc/nixos/state.json"