Text editor is not handling indentation and - prefix within collections automatically

[harmen-xb]

When writing a YAML file by hand, and you type the property name of a collection and then press 'Enter', to get to the next line the identation is not automatically done. You have to indent it yourself to get the right auto-completion.

Since within the grammer it is known that we just typed the name of a collection/array the LSP/editor should be aware that indentation needs to happen.

After indentation for a collection we always need to start with a '- ' the describe the item in the collection, which can also be automated.