Suggestion regarding FAQ documentation

[dto]

You may wish to add the following note to the extension advice on the Algernon github pages: After following the instructions, in order to try my new class for Project switching actions, I had to execute the following expressions:

ALGItemProvider initializeItems.
ALGInstallation someInstance cleanup.

Also, I notice that the information about extending Algernon in this way is located on two different pages:

https://github.com/hpi-swa-teaching/Algernon-Launcher/wiki/How-to-extend-Algernon
https://github.com/hpi-swa-teaching/Algernon-Launcher/wiki/Architecture-of-Algernon

It might make sense for the updated info about extending Algernon to be collected onto a single page.