[v8] Bun Global Unhandled Handlers (#11960)

Add support for global onUnhandled Error/Promise for Bun.

```javascript
import * as Sentry from "@sentry/bun";

Sentry.init({
    dsn: "DSN",
});

console.log("Hello via Bun!");

throw new Error('Unhandled Bun Sentry Error!');
```

<img width="1063" alt="image"
src="https://github.com/getsentry/sentry-javascript/assets/363802/fd90969f-82a4-4300-a67e-1ebb5cf540fa">

ref: oven-sh/bun#5091

Author: HazAT

packages/bun/src/sdk.ts

@@ -12,6 +12,8 @@ import {
   modulesIntegration,
   nativeNodeFetchIntegration,
   nodeContextIntegration,
+  onUncaughtExceptionIntegration,
+  onUnhandledRejectionIntegration,
 } from '@sentry/node';
 import type { Integration, Options } from '@sentry/types';
 
@@ -33,9 +35,9 @@ export function getDefaultIntegrations(_options: Options): Integration[] {
     consoleIntegration(),
     httpIntegration(),
     nativeNodeFetchIntegration(),
-    // Global Handlers # TODO (waiting for https://github.com/oven-sh/bun/issues/5091)
-    // new NodeIntegrations.OnUncaughtException(),
-    // new NodeIntegrations.OnUnhandledRejection(),
+    // Global Handlers
+    onUncaughtExceptionIntegration(),
+    onUnhandledRejectionIntegration(),
     // Event Info
     contextLinesIntegration(),
     nodeContextIntegration(),