add docs for windows cli installer

docs/.includes/installer_cli.md

@@ -24,7 +24,21 @@
 
 === "Windows"
 
-    CLI installers on Windows are currently not supported.
+    Windows installers are created using
+    [NSIS](https://nsis.sourceforge.io/Main_Page).
+    You must ensure that NSIS is installed and available on the system path.
+    The installer is an executable in `target/release/projectname-v1.2.3-win.exe`
+    that can be run by double-clicking it.
+
+    The installer will ask the user for the target directory.
+    It will then copy the binary to the target directory and create an uninstaller.
+
+    When using the uninstaller that is created with NSIS, all PyApp data from this project will be removed as well in order to provide the user with a clean uninstallation.
+
+    !!! warning
+        The installer will not add the install directory to the `PATH` variable.
+        You or the user must do this manually.
+        This is also stated on the last page of the installer.
 
 === "macOS"