add functionality to export and load database

packages/ui/src/api/database.js

@@ -0,0 +1,9 @@
+import client from './client'
+
+const getExportDatabase = () => client.get('/database/export')
+const createLoadDatabase = (body) => client.post('/database/load', body)
+
+export default {
+    getExportDatabase,
+    createLoadDatabase
+}