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/window/center-window/index.tsx

@@ -0,0 +1,45 @@
+import { Gdk, Gtk } from "ags/gtk4";
+import { Separator } from "../../widget/Separator";
+import { PopupWindow } from "../../widget/PopupWindow";
+import { BigMedia } from "./widgets/BigMedia";
+import { time, variableToBoolean } from "../../modules/utils";
+import { createBinding } from "ags";
+
+import Media from "../../modules/media";
+import AstalMpris from "gi://AstalMpris";
+
+
+export const CenterWindow = (mon: number) => 
+    <PopupWindow namespace={"center-window"} marginTop={10} monitor={mon}
+      halign={Gtk.Align.CENTER} valign={Gtk.Align.START}
+      actionKeyPressed={(_, keyval) => {
+          if(keyval === Gdk.KEY_space) {
+              Media.getDefault().player.available && 
+                  Media.getDefault().player.play_pause();
+              return true;
+          }
+      }}>
+      
+        <Gtk.Box class={"center-window-container"} spacing={6}>
+            <Gtk.Box class={"left"} orientation={Gtk.Orientation.VERTICAL}>
+                <Gtk.Box class={"datetime"} orientation={Gtk.Orientation.VERTICAL}
+                  halign={Gtk.Align.CENTER} valign={Gtk.Align.CENTER} vexpand>
+
+                    <Gtk.Label class={"time"} label={time(t => t.format("%H:%M")!)} />
+                    <Gtk.Label class={"date"} label={time(d => d.format("%A, %B %d")!)} />
+                </Gtk.Box>
+                <Gtk.Box class={"calendar-box"} hexpand={true} valign={Gtk.Align.START}>
+                    <Gtk.Calendar showHeading={true} showDayNames={true} 
+                      showWeekNumbers={false} 
+                    />
+                </Gtk.Box>
+            </Gtk.Box>
+
+            <Separator orientation={Gtk.Orientation.HORIZONTAL} cssColor="gray"
+              margin={5} spacing={8} alpha={.3} visible={variableToBoolean(
+                  createBinding(AstalMpris.get_default(), "players")
+              )}
+            />
+            <BigMedia />
+        </Gtk.Box>
+    </PopupWindow>;