BREAKING_CHANGE(core): remove legacy forwarding module in favor of route-based system

- Removed the forwarding namespace export from main index
- Removed TForwardingType and all forwarding handlers
- Consolidated route helper functions into route-helpers.ts
- All functionality is now available through the route-based system
- Users must migrate from forwarding.* imports to direct route helper imports

ts/index.ts

@@ -32,7 +32,6 @@ export * from './core/models/common-types.js';
 export type { IAcmeOptions } from './proxies/smart-proxy/models/interfaces.js';
 
 // Modular exports for new architecture
-export * as forwarding from './forwarding/index.js';
 // Certificate module has been removed - use SmartCertManager instead
 export * as tls from './tls/index.js';
 export * as routing from './routing/index.js';