nixos: add quickshell/waybar/taffybar modules

- Switch taffybar input to the local submodule
- Add caelestia quickshell (home-manager module)
- Make waybar/taffybar mutually exclusive, defaulting based on xmonad
- Move tray ordering and status notifier watcher config into the right modules

nixos/waybar.nix

@@ -0,0 +1,26 @@
+{ config, pkgs, makeEnable, ... }:
+makeEnable config "myModules.waybar" false {
+  home-manager.sharedModules = [
+    {
+      programs.waybar.enable = true;
+
+      systemd.user.services.waybar = {
+        Unit = {
+          Description = "Waybar";
+          PartOf = [ "wayland-session@Hyprland.target" "tray.target" ];
+          After = [ "wayland-session@Hyprland.target" "tray.target" ];
+          Wants = [ "tray.target" ];
+        };
+        Service = {
+          ExecStartPre = "${pkgs.bash}/bin/bash -lc 'uid=$(id -u); runtime_dir=\"$XDG_RUNTIME_DIR\"; if [ -z \"$runtime_dir\" ]; then runtime_dir=\"/run/user/$uid\"; fi; for i in $(seq 1 50); do if [ -n \"$WAYLAND_DISPLAY\" ] && [ -S \"$runtime_dir/$WAYLAND_DISPLAY\" ]; then found=1; break; fi; sleep 0.1; done; if [ -z \"$found\" ]; then exit 1; fi; \"$HOME/.config/waybar/scripts/render-config\"'";
+          ExecStart = "${pkgs.waybar}/bin/waybar -c %t/waybar/config.jsonc -s %t/waybar/style.css";
+          Restart = "always";
+          RestartSec = 1;
+        };
+        Install = {
+          WantedBy = [ "wayland-session@Hyprland.target" ];
+        };
+      };
+    }
+  ];
+}