fix(strcuture): refactor responsibilities

ts/proxies/http-proxy/index.ts

@@ -0,0 +1,13 @@
+/**
+ * HttpProxy implementation
+ */
+// Re-export models
+export * from './models/index.js';
+
+// Export HttpProxy and supporting classes
+export { HttpProxy } from './http-proxy.js';
+export { CertificateManager } from './certificate-manager.js';
+export { ConnectionPool } from './connection-pool.js';
+export { RequestHandler } from './request-handler.js';
+export type { IMetricsTracker, MetricsTracker } from './request-handler.js';
+export { WebSocketHandler } from './websocket-handler.js';