feat(dropbox): add new folders trigger

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

@@ -0,0 +1,12 @@
+---
+favicon: /favicons/dropbox.svg
+items:
+  - name: New folders
+    desc: Triggers when any new folder is added. Ensure that the number of files/folders within the monitored directory remains below 4000.
+---
+
+<script setup>
+  import CustomListing from '../../components/CustomListing.vue'
+</script>
+
+<CustomListing />