feat: add QR code generator and Nostr event handling

- Added the `simplesoftwareio/simple-qrcode` package to the project
- Created a new JavaScript file `nostrZap.js` to handle Nostr events
- Added the `nostrZap` function to the Alpine.js data property in `app.js`
- Updated the `services.php` configuration file to include the `nostr` environment variable
- Created a new database migration to add a `payment_event` field to the `einundzwanzig_plebs` table
- Made adjustments in the `Election:year.blade.php` view file to handle potential null values
- Updated `composer.lock` and `package.json` with the new dependencies

database/migrations/2024_09_30_074429_add_payment_fields_to_einundzwanzig_plebs_table.php

@@ -0,0 +1,28 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    /**
+     * Run the migrations.
+     */
+    public function up(): void
+    {
+        Schema::table('einundzwanzig_plebs', function (Blueprint $table) {
+            $table->string('payment_event', 255 * 2)->nullable();
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        Schema::table('einundzwanzig_plebs', function (Blueprint $table) {
+            //
+        });
+    }
+};