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

docker-compose.yml

@@ -67,7 +67,7 @@ services:
             timeout: 5s
     relay:
         ports:
-            - "7000"
+            - "7000:7000"
         volumes:
             - ./relay:/usr/src/app/db
             - ./relay/config.toml:/usr/src/app/config.toml