Add about hyperlink to footer

src/lib/components/Footer.svelte

@@ -24,6 +24,7 @@
     </div>
 
     <nav class="footer-nav">
+      <a href="/about">{$t('footer.about')}</a>
       <a href="/privacy-policy">{$t('footer.privacy.policy')}</a>
       <a href="/terms-of-service">{$t('footer.terms.of.service')}</a>
     </nav>

src/lib/translations/en-US/footer.json

@@ -1,4 +1,5 @@
 {
+  "about": "ℹ About",
   "privacy.policy": "🔐 Privacy Policy",
   "terms.of.service": "📝 Terms of Service",
   "copyright": "Copyright © {{year}} <a href=\"{{website}}\" target=\"_blank\" rel=\"noreferrer\">Leonardo Murça</a>. <br/> All rights reserved.",

src/lib/translations/pt-BR/footer.json

@@ -1,4 +1,5 @@
 {
+  "about": "ℹ Sobre",
   "privacy.policy": "🔐 Política de Privacidade",
   "terms.of.service": "📝 Termos de Serviço",
   "copyright": "Copyright © {{year}} <a href=\"{{website}}/pt-br\" target=\"_blank\" rel=\"noreferrer\">Leonardo Murça</a>. <br/> Todos os direitos reservados.",