feat: minor cleanup and doc update

mod.ts

@@ -1,7 +1,6 @@
 export * from "./libraries/action.ts";
 export * from "./libraries/adapter.ts";
 export * from "./libraries/api.ts";
-export * from "./libraries/client.ts";
 export * from "./libraries/errors.ts";
 export * from "./libraries/procedure.ts";
 export * from "./libraries/relay.ts";