feat: make AGS colorshell configuration fully declarative

- Add complete colorshell v2.0.3 configuration to home/ags-config/
- Disable runner plugin and NightLight tile (incompatible with NixOS)
- Customize SCSS with full opacity (no transparency)
- Add dark pale blue color scheme in home/pywal-colors/
- Configure Papirus-Dark icon theme via home-manager
- Make ~/.config/ags/ immutable and managed by Nix store
- Auto-deploy pywal colors to ~/.cache/wal/colors.json

All AGS configuration is now reproducible and version controlled.

home/ags-config/widget/AskPopup.tsx

@@ -0,0 +1,38 @@
+import { Accessor } from "ags";
+import { tr } from "../i18n/intl";
+import { CustomDialog } from "./CustomDialog";
+import { Astal } from "ags/gtk4";
+
+
+export type AskPopupProps = {
+    title?: string | Accessor<string>;
+    text: string | Accessor<string>;
+    cancelText?: string;
+    acceptText?: string;
+    onAccept?: () => void;
+    onCancel?: () => void;
+};
+
+/** 
+ * A Popup Widget that asks yes or no to a defined promt. 
+ * Runs onAccept() when user accepts, or else onDecline() when
+ * user doesn't accept / closes window.
+ * This window isn't usually registered in this shell windowing 
+ * system.
+ */
+export function AskPopup(props: AskPopupProps): Astal.Window {
+    let accepted: boolean = false;
+
+    return <CustomDialog namespace={"ask-popup"} widthRequest={400} heightRequest={250}
+      title={props.title ?? tr("ask_popup.title")} text={props.text} 
+      onFinish={() => !accepted && props.onCancel?.()} options={[
+        { text: props.cancelText ?? tr("cancel") },
+        {
+            text: props.acceptText ?? tr("accept"),
+            onClick: () => {
+                accepted = true;
+                props.onAccept?.();
+            }
+        }
+    ]} /> as Astal.Window;
+}