add windows dev guidance

Author: bckohan

CONTRIBUTING.md

@@ -12,6 +12,14 @@ We are actively seeking additional maintainers. If you're interested, please ope
 poetry install
 ```
 
+### Windows
+
+There is a symbolic link to the top level examples directory in tests. On Windows to make sure this link is created you need to be in developer mode and to configure git to allow symbolic links:
+
+```console
+git config core.symlinks true
+```
+
 ## Documentation
 
 `django-typer` documentation is generated using [Sphinx](https://www.sphinx-doc.org) with the [furo](https://github.com/pradyunsg/furo) theme. Any new feature PRs must provide updated documentation for the features added. To build the docs run doc8 to check for formatting issues then run Sphinx: