Added a section for the "Could not load library client." error (#3)

* Added a section for the "Could not load library client. Try restarting. If that doesn't work, verify the cache." error in the troubleshooting section

Because even with a proper guide, people can still not get their game working.

* Add a picture of the folder structure for the mod

* Added an hyperlink to point to the "Installing NT;RE" section and added an example image of the game folder's structure for reference

Author: kassibuss

src/guide/install/folderstructure.png

@@ -96,3 +96,10 @@ When NT;RE is launched, a Window with options should popup. On the top
 "Container runtime" option change from "None" to "sniper 0.YYYYMMDD.VERSION"
 then click "Run". This will popup everytime NT;RE is started through Steam.
 
+### Could not load library client. Try restarting. If that doesn't work, verify the cache.
+
+#### Windows
+
+[Double check the contents](#installing-ntre) of your installation folder, you probably did not extract folders/files properly or are missing some all together. Make sure you have downloaded the necessary libraries and resource files from the "Assets" section of the latest release. Down below is an image of how your installation folder should look like:
+
+![Picture of the installation folder](folderstructure.png)