feat: script to generate an nsec

This fixes: https://gitlab.com/soapbox-pub/ditto/-/issues/85

scripts/nsec.ts

@@ -0,0 +1,16 @@
+import { generateSecretKey, nip19 } from '@/deps.ts';
+
+switch (Deno.args[0]) {
+  default: {
+    const encodedNsec = generateEncodedPrivateKey();
+    console.log(encodedNsec);
+    Deno.exit(0);
+  }
+}
+
+function generateEncodedPrivateKey(): string {
+  const sk = generateSecretKey();
+  const nsec = nip19.nsecEncode(sk);
+
+  return nsec;
+}