feat: 添加 Lighter 签名桥接和公钥派生脚本，支持新的签名库和环境检测功能

scripts/derive-public.ts

@@ -0,0 +1,16 @@
+import { LighterPrivateKey } from "../src/exchanges/lighter/crypto/schnorr";
+import { bytesToHex } from "../src/exchanges/lighter/bytes";
+
+function derive(keyHex: string): string {
+  const normalized = keyHex.startsWith("0x") ? keyHex.slice(2) : keyHex;
+  const key = LighterPrivateKey.fromHex(normalized);
+  return bytesToHex(key.publicKey().toBytes());
+}
+
+const input = process.argv[2];
+if (!input) {
+  console.error("usage: bun run scripts/derive-public.ts <hex>");
+  process.exit(1);
+}
+
+console.log(derive(input));