Automatic suggestion of end; for interface and class creation

[Sebastian Klatte]

Two things:

1. Append the end-keyword after creation of an interface or class and pressing ENTER

2. Suggest adding the end-keyword in interface class (this works somehow when i add the suggested GUID first, but not without GUID)

[Christopher Wosinski]

For the moment all the snippets shown in the first image are made by VSCode snippets. Unfortunately they are not context sensitive. They need to be reimplemented in the language service. This will take some time.