docs: Restructure apps documentation, add triggers and actions

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

@@ -0,0 +1,21 @@
+---
+items:
+  - name: New issue
+    desc: Triggers when a new issue is created
+    avatar: /favicons/github.svg
+  - name: New pull requests
+    desc: Triggers when a new pull request is created
+    avatar: /favicons/github.svg
+  - name: New stargazers
+    desc: Triggers when a user stars a repository
+    avatar: /favicons/github.svg
+  - name: New watchers
+    desc: Triggers when a user watches a repository
+    avatar: /favicons/github.svg
+---
+
+<script setup>
+  import CustomListing from '../../components/CustomListing.vue'
+</script>
+
+<CustomListing />