Gate sway stack configs on sway_setup via .chezmoiignore.tmpl

Only the install script respected the flag; dot_sway/wofi/foot/mako/
waybar deployed unconditionally. Now ignored when sway_setup=false.

.chezmoiignore.tmpl

@@ -0,0 +1,19 @@
+# chezmoi-managed: do not edit by hand, run `chezmoi edit` instead
+.git
+README.md
+*.bak
+*.swp
+.DS_Store
+
+# nvim plugin lockfile is regenerated by lazy.nvim per-machine
+.config/nvim/lazy-lock.json
+# Wayland/sway desktop stack — only deploy when sway_setup is enabled
+{{ if not .sway_setup }}
+.config/sway
+.config/waybar
+.config/wofi
+.config/foot
+.config/mako
+40-install-sway.sh
+40-install-sway-gentoo.sh
+{{ end }}