feat(docs): docs: replace IPTablesProxy references with NfTablesProxy in README and examples, updating configuration options and diagrams for advanced nftables features

ts/00_commitinfo_data.ts

@@ -3,6 +3,6 @@
  */
 export const commitinfo = {
   name: '@push.rocks/smartproxy',
-  version: '5.0.0',
+  version: '5.1.0',
   description: 'A powerful proxy package that effectively handles high traffic, with features such as SSL/TLS support, port proxying, WebSocket handling, dynamic routing with authentication options, and automatic ACME certificate management.'
 }