feat: add dry-run options and retry helper

src/infra/retry.ts

@@ -0,0 +1,18 @@
+export async function retryAsync<T>(
+	fn: () => Promise<T>,
+	attempts = 3,
+	initialDelayMs = 300,
+): Promise<T> {
+	let lastErr: unknown;
+	for (let i = 0; i < attempts; i += 1) {
+		try {
+			return await fn();
+		} catch (err) {
+			lastErr = err;
+			if (i === attempts - 1) break;
+			const delay = initialDelayMs * 2 ** i;
+			await new Promise((r) => setTimeout(r, delay));
+		}
+	}
+	throw lastErr;
+}