feat(client): add local trust material state store

plugin/index.ts

@@ -1,5 +1,19 @@
 export { validateYonexusClientConfig, YonexusClientConfigError } from "./core/config.js";
 export type { YonexusClientConfig } from "./core/config.js";
+export {
+  CLIENT_STATE_VERSION,
+  YonexusClientStateError,
+  YonexusClientStateCorruptionError,
+  createYonexusClientStateStore,
+  loadYonexusClientState,
+  saveYonexusClientState,
+  createInitialClientState,
+  hasClientSecret,
+  hasClientKeyPair,
+  type YonexusClientState,
+  type YonexusClientStateFile,
+  type YonexusClientStateStore
+} from "./core/state.js";
 
 export interface YonexusClientPluginManifest {
   readonly name: "Yonexus.Client";