feat(hyprshade): add hyprshade and set timer

users/modules/programs/hyprshade.nix

@@ -0,0 +1,18 @@
+{ pkgs, ... }:
+{
+  home.packages = [ pkgs.hyprshade ];
+  xdg.configFile."hypr/hyprshade.toml" = {
+    enable = true;
+    text = # toml
+      ''
+        [[shades]]
+        name = "vibrance"
+        default = true  # will be activated when no other shader is scheduled
+
+        [[shades]]
+        name = "blue-light-filter"
+        start_time = 19:00:00
+        end_time = 07:00:00   # optional if more than one shader has start_time
+      '';
+  };
+}