docs: Add datastore app to the integration list

packages/docs/pages/apps/datastore/actions.md

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+---
+favicon: /favicons/datastore.svg
+items:
+  - name: Get value
+    desc: Get value from the persistent datastore.
+  - name: Set value
+    desc: Set value to the persistent datastore.
+---
+
+<script setup>
+  import CustomListing from '../../components/CustomListing.vue'
+</script>
+
+<CustomListing />

packages/docs/pages/apps/datastore/connection.md

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+# Datastore
+
+Datastore is a persistent key-value storage system that allows you to store and retrieve data. Currently you can use it within the scope of the flow, meaning you can store and retrieve data within the same flow.