refactor(schemas): group network schemas by direction

Move request and response schemas into matching subdirectories, extract the shared chat lock type, and update barrels and imports without changing wire formats.

src/data/schemas/payment/response/index.ts

@@ -0,0 +1,8 @@
+/**
+ * @file Automatically generated by barrelsby.
+ */
+
+export * from "./create_payment_order_response";
+export * from "./payment_order_status_response";
+export * from "./payment_plans_response";
+export * from "./tip_payment_plans_response";