docs: add v1.2.22 features to documentation (#23083)

## Summary
Adds minimal documentation for features introduced in Bun v1.2.22 that
were previously undocumented.

## Changes
- Add `redis.hget()` example showing direct value return vs `hmget()`
array
- Add WebSocket subprotocol negotiation example with array syntax
- Mark bundler `onEnd` hook as implemented in plugins docs
- Add `bun run --workspaces` flag documentation
- Update `perf_hooks.monitorEventLoopDelay` as implemented in Node.js
APIs
- Add async stack traces note to debugger docs
- Document TTY access pattern after stdin closes

All changes are minimal - just code snippets or single-line mentions in
existing files. No new files created.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

---------

Co-authored-by: Claude Bot <claude-bot@bun.sh>
Co-authored-by: Claude <noreply@anthropic.com>

docs/api/redis.md

@@ -132,6 +132,10 @@ await redis.hmset("user:123", [
 const userFields = await redis.hmget("user:123", ["name", "email"]);
 console.log(userFields); // ["Alice", "alice@example.com"]
 
+// Get single field from hash (returns value directly, null if missing)
+const userName = await redis.hget("user:123", "name");
+console.log(userName); // "Alice"
+
 // Increment a numeric field in a hash
 await redis.hincrby("user:123", "visits", 1);
 

docs/api/websockets.md

@@ -279,6 +279,9 @@ Bun implements the `WebSocket` class. To create a WebSocket client that connects
 
 ```ts
 const socket = new WebSocket("ws://localhost:3000");
+
+// With subprotocol negotiation
+const socket2 = new WebSocket("ws://localhost:3000", ["soap", "wamp"]);
 ```
 
 In browsers, the cookies that are currently set on the page will be sent with the WebSocket upgrade request. This is a standard feature of the `WebSocket` API.

docs/cli/run.md

@@ -166,6 +166,14 @@ will execute `<script>` in both `bar` and `baz`, but not in `foo`.
 
 Find more details in the docs page for [filter](https://bun.com/docs/cli/filter#running-scripts-with-filter).
 
+### `--workspaces`
+
+Run scripts across all workspaces in the monorepo:
+
+```bash
+bun run --workspaces test
+```
+
 ## `bun run -` to pipe code from stdin
 
 `bun run -` lets you read JavaScript, TypeScript, TSX, or JSX from stdin and execute it without writing to a temporary file first.

docs/install/workspaces.md

@@ -81,7 +81,7 @@ Workspaces have a couple major benefits.
 
 - **Code can be split into logical parts.** If one package relies on another, you can simply add it as a dependency in `package.json`. If package `b` depends on `a`, `bun install` will install your local `packages/a` directory into `node_modules` instead of downloading it from the npm registry.
 - **Dependencies can be de-duplicated.** If `a` and `b` share a common dependency, it will be _hoisted_ to the root `node_modules` directory. This reduces redundant disk usage and minimizes "dependency hell" issues associated with having multiple versions of a package installed simultaneously.
-- **Run scripts in multiple packages.** You can use the [`--filter` flag](https://bun.com/docs/cli/filter) to easily run `package.json` scripts in multiple packages in your workspace.
+- **Run scripts in multiple packages.** You can use the [`--filter` flag](https://bun.com/docs/cli/filter) to easily run `package.json` scripts in multiple packages in your workspace, or `--workspaces` to run scripts across all workspaces.
 
 ## Share versions with Catalogs