feat: add application productivity foundations

packages/csr/src/index.ts

@@ -16,6 +16,8 @@ export { REACTIVE_RUNTIME } from "./reactive-runtime.ts";
 export { NAV_RUNTIME } from "./nav-runtime.ts";
 export { REALTIME_RUNTIME } from "./realtime-runtime.ts";
 export { ACTION_RUNTIME } from "./action-runtime.ts";
+export { createApiClient } from "./api-client.ts";
+export type { ApiClientOptions, ApiRequest } from "./api-client.ts";
 
 const CONTROLLER_SECTIONS = ["PRIMARY", "UI", "PIN"] as const;