feat(gmail): add new emails trigger

packages/docs/pages/apps/gmail/triggers.md

@@ -0,0 +1,12 @@
+---
+favicon: /favicons/gmail.svg
+items:
+  - name: New emails
+    desc: Triggers when a new email is received in the specified mailbox.
+---
+
+<script setup>
+  import CustomListing from '../../components/CustomListing.vue'
+</script>
+
+<CustomListing />

packages/docs/pages/guide/available-apps.md

@@ -14,6 +14,7 @@ The following integrations are currently supported by Automatisch.
 - [Ghost](/apps/ghost/triggers)
 - [GitHub](/apps/github/triggers)
 - [GitLab](/apps/gitlab/triggers)
+- [Gmail](/apps/gmail/triggers)
 - [Google Calendar](/apps/google-calendar/triggers)
 - [Google Drive](/apps/google-drive/triggers)
 - [Google Forms](/apps/google-forms/triggers)