Add language: Scottish Gaelic (#7864)

* Create messages.po

* Update app.config.js

* Update lingui.config.js

* Update dates.ts

* Update helpers.ts

* Update i18n.ts

* Update i18n.web.ts

* Update languages.ts

src/locale/i18n.ts

@@ -25,6 +25,7 @@ import {messages as messagesEu} from '#/locale/locales/eu/messages'
 import {messages as messagesFi} from '#/locale/locales/fi/messages'
 import {messages as messagesFr} from '#/locale/locales/fr/messages'
 import {messages as messagesGa} from '#/locale/locales/ga/messages'
+import {messages as messagesGd} from '#/locale/locales/gd/messages'
 import {messages as messagesGl} from '#/locale/locales/gl/messages'
 import {messages as messagesHi} from '#/locale/locales/hi/messages'
 import {messages as messagesHu} from '#/locale/locales/hu/messages'
@@ -159,6 +160,14 @@ export async function dynamicActivate(locale: AppLanguage) {
       ])
       break
     }
+    case AppLanguage.gd: {
+      i18n.loadAndActivate({locale, messages: messagesGd})
+      await Promise.all([
+        import('@formatjs/intl-pluralrules/locale-data/gd'),
+        import('@formatjs/intl-numberformat/locale-data/gd'),
+      ])
+      break
+    }
     case AppLanguage.gl: {
       i18n.loadAndActivate({locale, messages: messagesGl})
       await Promise.all([