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/runner/plugins/shell.ts

@@ -0,0 +1,65 @@
+import { Runner } from "../Runner";
+import { Notifications } from "../../modules/notifications";
+
+import GLib from "gi://GLib?version=2.0";
+import Gio from "gi://Gio?version=2.0";
+
+
+export const PluginShell = (() => {
+
+    const shell = GLib.getenv("SHELL") ?? "/bin/sh";
+    const procLauncher = Gio.SubprocessLauncher.new(
+        Gio.SubprocessFlags.STDOUT_PIPE | Gio.SubprocessFlags.STDERR_PIPE);
+
+    procLauncher.set_cwd(GLib.get_home_dir());
+
+    return {
+        prefix: '!',
+        prioritize: true,
+        handle: (input) => {
+            let showOutputNotif: boolean = false;
+            if(input.startsWith('!')) {
+                input = input.replace('!', "");
+                showOutputNotif = true;
+            }
+
+            const command = input ? GLib.shell_parse_argv(input) : undefined;
+            const shellSplit = shell.split('/'),
+                shellName = shellSplit[shellSplit.length-1];
+
+            return {
+                actionClick: () => {
+                    if(!command?.[0] || !command[1]) return;
+
+                    const proc = procLauncher.spawnv([ shell, "-c", `${input}` ]);
+                    proc.communicate_utf8_async(null, null, (_, asyncResult) => {
+                        const [ success, stdout, stderr ] = proc.communicate_utf8_finish(asyncResult);
+
+                        if(!success || stderr) {
+                            Notifications.getDefault().sendNotification({
+                                appName: shell,
+                                summary: "Command error",
+                                body: `An error occurred on \`${input}\`. Stderr: ${stderr}`
+                            });
+
+                            return;
+                        }
+
+                        if(!showOutputNotif) return;
+
+                        Notifications.getDefault().sendNotification({
+                            appName: shell,
+                            summary: "Command output",
+                            body: stdout
+                        });
+                    });
+                },
+                title: `Run ${input ? ` \`${input}\`` : `with ${shellName}`}`,
+                description: input || showOutputNotif ? `${input ? `${shell}\t` : ""}${
+                    showOutputNotif ? "(showing output on notification)" : "" }`
+                : "",
+                icon: "utilities-terminal-symbolic"
+            };
+        }
+    } as Runner.Plugin
+})();