feat: Add Discord logging support

- Added Discord webhook URL to .env.example
- Included 'marvinlabs/laravel-discord-logger' in composer.json
- Created config file for Discord logger settings

.env.example

@@ -5,6 +5,8 @@ APP_DEBUG=true
 APP_TIMEZONE=Europe/Amsterdam
 APP_URL=http://127.0.0.1:8000
 
+LOG_DISCORD_WEBHOOK_URL=https://discord.com/api/webhooks/
+
 APP_LOCALE=en
 APP_FALLBACK_LOCALE=en
 APP_FAKER_LOCALE=en_US
@@ -36,7 +38,7 @@ HCAPTCHA_SECRET=secret-key
 HCAPTCHA_SITEKEY=site-key
 
 LOG_CHANNEL=stack
-LOG_STACK=single
+LOG_STACK=single,discord
 LOG_DEPRECATIONS_CHANNEL=null
 LOG_LEVEL=debug