Add v8 heap snapshot guide

docs/guides/runtime/heap-snapshot.md

@@ -0,0 +1,26 @@
+---
+name: Track memory usage using V8 heap snapshots
+---
+
+Bun implements V8's heap snapshot API, which allows you to create snapshots of the heap at runtime. This helps debug memory leaks in your JavaScript/TypeScript application.
+
+```ts#snapshot.ts
+import v8 from "node:v8";
+
+// Creates a heap snapshot file with an auto-generated name
+const snapshotPath = v8.writeHeapSnapshot();
+console.log(`Heap snapshot written to: ${snapshotPath}`);
+```
+
+---
+
+## Inspect memory in Chrome DevTools
+
+To view V8 heap snapshots in Chrome DevTools:
+
+1. Open Chrome DevTools (F12 or right-click and select "Inspect")
+2. Go to the "Memory" tab
+3. Click the "Load" button (folder icon)
+4. Select your `.heapsnapshot` file
+
+{% image src="/images/chrome-devtools-memory.png" alt="Chrome DevTools Memory Tab" width="100%" /%}