BREAKING CHANGE(core): refactor: reorganize internal module structure to use classes.pp.* modules

- Renamed port proxy and SNI handler source files to classes.pp.portproxy.js and classes.pp.snihandler.js respectively
- Updated import paths in index.ts and test files (e.g. in test.ts and test.router.ts) to reference the new file names
- This refactor improves code organization but breaks direct imports from the old paths

ts/index.ts

@@ -1,6 +1,6 @@
 export * from './classes.iptablesproxy.js';
 export * from './classes.networkproxy.js';
-export * from './classes.portproxy.js';
+export * from './classes.pp.portproxy.js';
 export * from './classes.port80handler.js';
 export * from './classes.sslredirect.js';
-export * from './classes.snihandler.js';
+export * from './classes.pp.snihandler.js';