feat(examples/nwc) ; rewrite keysend in typescript (#425)

* chore(examples/nwc): rename keysend from js to ts

* feat(examples/nwc): rewrite keysend in ts

Author: Dunsin-cyber

examples/nwc/keysend.js examples/nwc/keysend.tsexamples/nwc/keysend.js renamed to examples/nwc/keysend.ts

@@ -3,7 +3,7 @@ import "websocket-polyfill"; // required in node.js
 import * as readline from "node:readline/promises";
 import { stdin as input, stdout as output } from "node:process";
 
-import { webln as providers } from "../../dist/index.module.js";
+import { webln as providers } from "@getalby/sdk";
 
 const rl = readline.createInterface({ input, output });