README: explain how to enable symlinks on Windows 10

Fixes KDAB#426

Author: Be-ing

README.md

@@ -64,6 +64,22 @@ bindings for QWidgets APIs.
 
 ## Contributing to CXX-Qt
 
+### Clone the Git repository
+
+This repository contains symbolic links, which requires some setup on Windows 10 before cloning the repository.
+First, [enable Windows Developer Mode](https://learn.microsoft.com/en-us/gaming/game-bar/guide/developer-mode)
+to avoid needing administrator privileges to create symlinks. Then, enable symlinks in Git:
+
+```shell
+git config core.symlinks true
+```
+
+Now clone the Git repository:
+
+```shell
+git clone https://github.com/KDAB/cxx-qt.git
+```
+
 ### Building
 
 Ensure that you have the following installed