docs(js): Document nodeCronIntegration for Crons

includes/javascript-crons-automatic-crons-instrumentation.mdx

@@ -27,6 +27,38 @@ const job = CronJobWithCheckIn.from({
 
 ### Node Cron
 
+#### Monitor All Named Tasks
+
+Requires SDK version `11.11.0` or higher.
+
+We recommend adding `nodeCronIntegration`, which monitors every task that has a `name`, without changing how you import `node-cron`:
+
+```JavaScript
+Sentry.init({
+  dsn: "___PUBLIC_DSN___",
+  integrations: [
+    Sentry.nodeCronIntegration({
+      excludeJobs: ["cleanup-temp-files", /^debug-/], // Optional.
+    }),
+  ],
+});
+```
+
+```JavaScript
+import cron from "node-cron";
+
+cron.schedule("0 9 * * 1-5", sendReport, {
+  name: "daily-report",
+  timezone: "Europe/Vienna",
+});
+```
+
+The monitor slug is the task's `name`. Tasks without a `name` aren't monitored. `excludeJobs` skips tasks whose name matches a string exactly or a regular expression.
+
+Each check-in sends the task's schedule and time zone (your server's time zone if `timezone` isn't set). Schedules that can't be expressed in the Crons schedule format (for example, a task that runs every 10 seconds) aren't monitored.
+
+#### Monitor Specific Tasks
+
 Requires SDK version `7.92.0` or higher.
 
 Use `Sentry.cron.instrumentNodeCron` to instrument the `cron` export from the [`node-cron`](https://www.npmjs.com/package/node-cron) library. This returns an object with the same API as the original `cron` export, but with the `schedule` method instrumented. You can pass the name of the cron monitor and an optional time zone as part of the third options argument to the function.
@@ -45,6 +77,8 @@ cronWithCheckIn.schedule(
 );
 ```
 
+`nodeCronIntegration` skips tasks created with `instrumentNodeCron`, so using both doesn't send duplicate check-ins.
+
 ### Node Schedule
 
 Requires SDK version `7.93.0` or higher.