chore: update readme to include install with bun

Author: Electroid

README.md

@@ -55,6 +55,12 @@ or
 pnpm add -D webpack-dev-server
 ```
 
+or
+
+```console
+bun add -D webpack-dev-server
+```
+
 _Note: While you can install and run webpack-dev-server globally, we recommend
 installing it locally. webpack-dev-server will always use a local installation
 over a global one._
@@ -72,6 +78,12 @@ The easiest way to use it is with the [webpack CLI](https://webpack.js.org/api/c
 npx webpack serve
 ```
 
+or
+
+```console
+bunx webpack serve
+```
+
 Following options are available with `webpack serve`:
 
 ```