feat(core): migrate system state to unified declarative JSON

- Consolidate all configuration toggles (suspend, idle, waybar, etc.) into ~/.config/home-manager/state.json
- Introduce nomarchy.toggles and nomarchy.hyprland options in Nix
- Inject toggle states into all bin/ scripts via environment variables
- Update toggle scripts to mutate JSON and trigger background rebuilds
- Add a migration script to transition legacy flag files to the new format

modules/home/options.nix

@@ -0,0 +1,77 @@
+{ lib, ... }:
+
+{
+  options.nomarchy = {
+    toggles = {
+      suspend = lib.mkOption {
+        type = lib.types.bool;
+        default = true;
+        description = "Whether to show suspend in system menu.";
+      };
+      screensaver = lib.mkOption {
+        type = lib.types.bool;
+        default = true;
+        description = "Whether the screensaver is enabled.";
+      };
+      idle = lib.mkOption {
+        type = lib.types.bool;
+        default = true;
+        description = "Whether the idle lock is enabled.";
+      };
+      nightlight = lib.mkOption {
+        type = lib.types.bool;
+        default = false;
+        description = "Whether the nightlight is enabled.";
+      };
+      waybar = lib.mkOption {
+        type = lib.types.bool;
+        default = true;
+        description = "Whether the top bar is enabled.";
+      };
+      skipVsCodeTheme = lib.mkOption {
+        type = lib.types.bool;
+        default = false;
+        description = "Whether to skip theme changes in VSCode.";
+      };
+    };
+    nightlightTemperature = lib.mkOption {
+      type = lib.types.int;
+      default = 4000;
+      description = "Temperature for the nightlight.";
+    };
+    theme = lib.mkOption {
+      type = lib.types.str;
+      default = "nord";
+      description = "System theme name.";
+    };
+    wallpaper = lib.mkOption {
+      type = lib.types.str;
+      default = "";
+      description = "System wallpaper path.";
+    };
+    hyprland = {
+      gaps_in = lib.mkOption {
+        type = lib.types.int;
+        default = 5;
+        description = "Inner gaps for Hyprland.";
+      };
+      gaps_out = lib.mkOption {
+        type = lib.types.int;
+        default = 10;
+        description = "Outer gaps for Hyprland.";
+      };
+      border_size = lib.mkOption {
+        type = lib.types.int;
+        default = 2;
+        description = "Border size for Hyprland.";
+      };
+    };
+    fonts = {
+      monospace = lib.mkOption {
+        type = lib.types.str;
+        default = "JetBrainsMono Nerd Font";
+        description = "System monospace font.";
+      };
+    };
+  };
+}