Add Nostr ecash transaction history CLI

- CLI tool to export NIP-60 (Cashu Wallet) and NIP-61 (Nutzap) transaction history as CSV
- Fetches and decrypts kind:17375 wallet, kind:7375 token, kind:7376 history, kind:9321 nutzap, and kind:7377 redemption events
- Accepts NOSTR_SECRET_KEY env var and optional --mints flag
- Outputs CSV to stdout with columns: date,type,amount,unit,mint,token_id,memo
- Progress and errors go to stderr

tsconfig.json

@@ -0,0 +1,15 @@
+{
+  "compilerOptions": {
+    "target": "ESNext",
+    "module": "ESNext",
+    "moduleResolution": "bundler",
+    "strict": true,
+    "esModuleInterop": true,
+    "skipLibCheck": true,
+    "forceConsistentCasingInFileNames": true,
+    "outDir": "dist",
+    "noEmit": true,
+    "types": ["bun-types"]
+  },
+  "include": ["src/**/*.ts"]
+}