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/proxies/smart-proxy/models/interfaces.ts

@@ -16,7 +16,6 @@ export interface IAcmeOptions {
   routeForwards?: any[];
 }
 import type { IRouteConfig } from './route-types.js';
-import type { TForwardingType } from '../../../forwarding/config/forwarding-types.js';
 
 /**
  * Provision object for static or HTTP-01 certificate

ts/proxies/smart-proxy/models/route-types.ts

@@ -1,6 +1,5 @@
 import * as plugins from '../../../plugins.js';
 // Certificate types removed - use local definition
-import type { TForwardingType } from '../../../forwarding/config/forwarding-types.js';
 import type { PortRange } from '../../../proxies/nftables-proxy/models/interfaces.js';
 import type { IRouteContext } from '../../../core/models/route-context.js';