Add winget install bindgen setup docs (#2424)

* Add winget install option for bindgen setup

Recent versions of Windows 10 and Windows 11 ship with the winget CLI tool, which can be used to install LLVM in a way similar to Linux.
This PR adds this option to the requirements docs.

* Address PR feedback

Author: CarePackage17

book/src/requirements.md

@@ -13,7 +13,12 @@ It is required to use Clang 5.0 or greater.
 
 #### Windows
 
-Download and install the official pre-built binary from
+If you use winget:
+```powershell
+winget install LLVM.LLVM
+```
+
+Alternatively, you can download and install the official pre-built binary from
 [LLVM download page](http://releases.llvm.org/download.html).
 
 You will also need to set `LIBCLANG_PATH` as an [environment