feat: drop mako and waybar for caelestia (quickshell)

shared/home-manager/dotfiles/quickshell.nix

@@ -0,0 +1,40 @@
+{ caelestia-shell, ... }:
+
+{
+  imports = [
+    caelestia-shell.homeManagerModules.default
+  ];
+
+  programs.caelestia = {
+    enable = true;
+
+    cli = {
+      enable = true;
+    };
+
+    settings = {
+      general = {
+        apps = {
+          terminal = [ "alacritty" ];
+        };
+        idle = {
+          lockBeforeSleep = false;
+          timeouts = [ ];
+        };
+      };
+
+      bar.status = {
+        showBattery = false;
+      };
+
+      # "Open" notification on clicking.
+      notifs.actionOnClick = true;
+
+      services = {
+        useFahrenheit = false;
+        useFahrenheitPerformance = false;
+        useTwelveHourClock = false;
+      };
+    };
+  };
+}