Remove Sway from the playbook, keep Noctalia configs

Drop the profile_desktop_sway role (tasks, templates), all Sway
dotfiles, desktop_sway_* vars, and wayland-sessions emptty path.
Noctalia dotfiles are preserved and deployed via desktop_void_dotfiles
on Void hosts; noctalia_bar_monitors/noctalia_screen_overrides kept
as config vars. Only i3 remains as the Void desktop session.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

ansible/inventory/group_vars/void.yml

@@ -135,6 +135,10 @@ desktop_void_dotfiles:
     src: .local/bin/update-turnstile-env
     dest: .local/bin/update-turnstile-env
     mode: "0755"
+  - name: Noctalia config
+    src: .config/noctalia/
+    dest: .config/noctalia/
+    mode: preserve
 
 desktop_common_packages:
   - brightnessctl
@@ -173,14 +177,6 @@ desktop_i3_packages:
   - xorg-minimal
   - xss-lock
 
-desktop_sway_packages:
-  - grim
-  - kanshi
-  - slurp
-  - swayfx
-  - wl-clipboard
-  - xdg-desktop-portal-wlr
-
 profile_packages:
   - alacritty
   - bluez