feat: add app connections w/ testing and deleting functions

packages/web/src/graphql/queries/test-connection.ts

@@ -0,0 +1,7 @@
+import { gql } from '@apollo/client';
+
+export const TEST_CONNECTION = gql`
+  query TestConnection($id: String!) {
+    testConnection(id: $id)
+  }
+`;