Add a uuid guide

docs/guides/util/javascript-uuid.md

@@ -0,0 +1,23 @@
+---
+name: Generate a UUID
+---
+
+Use `crypto.randomUUID()` to generate a UUID v4. This API works in Bun, Node.js, and browsers. It requires no dependencies.
+
+```ts
+crypto.randomUUID();
+// => "123e4567-e89b-12d3-a456-426614174000"
+```
+
+---
+
+In Bun, you can also use `Bun.randomUUIDv7()` to generate a [UUID v7](https://www.ietf.org/archive/id/draft-peabody-dispatch-new-uuid-format-01.html).
+
+```ts
+Bun.randomUUIDv7();
+// => "0196a000-bb12-7000-905e-8039f5d5b206"
+```
+
+---
+
+See [Docs > API > Utils](https://bun.sh/docs/api/utils) for more useful utilities.