feat: write REST API endpoint to create connection

packages/backend/test/mocks/rest/api/v1/apps/create-connection.js

@@ -0,0 +1,25 @@
+const createConnection = (connection) => {
+  const connectionData = {
+    id: connection.id,
+    key: connection.key,
+    reconnectable: connection.reconnectable || true,
+    appAuthClientId: connection.appAuthClientId,
+    formattedData: connection.formattedData,
+    verified: connection.verified || false,
+    createdAt: connection.createdAt.getTime(),
+    updatedAt: connection.updatedAt.getTime(),
+  };
+
+  return {
+    data: connectionData,
+    meta: {
+      count: 1,
+      currentPage: null,
+      isArray: false,
+      totalPages: null,
+      type: 'Connection',
+    },
+  };
+};
+
+export default createConnection;