feat(contact): Add hCaptcha integration, Discord alert for contact

- Added hCaptcha validation to the contact form.
- Integrated hCaptcha configuration in the application.
- Implemented Discord alerts for new contact submissions with detailed content.

.env.example

@@ -20,6 +20,9 @@ GTAG_MEASUREMENT_ID="G-XXXXXXXXXX"
 DISCORD_ALERT_WEBHOOK="https://discord.com/api/webhooks/000000000000000000/"
 HONEYPOT_NAME="honeypot"
 
+HCAPTCHA_SECRET=secret-key
+HCAPTCHA_SITEKEY=site-key
+
 LOG_CHANNEL=stack
 LOG_DEPRECATIONS_CHANNEL=null
 LOG_LEVEL=debug