BREAKING CHANGE(core): Refactor to v3: introduce modular core/domain architecture, plugin system, observability and strict TypeScript configuration; remove legacy classes

ts/core/config/index.ts

@@ -0,0 +1,15 @@
+/**
+ * Configuration management for Elasticsearch client
+ *
+ * This module provides:
+ * - Fluent configuration builder
+ * - Environment variable support
+ * - File-based configuration
+ * - Secret provider integration
+ * - Configuration validation
+ *
+ * @packageDocumentation
+ */
+
+export * from './types.js';
+export * from './configuration-builder.js';