Completion context

The completion context describes the current context. It's used so not every source has again to determine e.g. where the cursor is in the file and what text was typed. The completion context required by the lsp is part of this context.

Reason

This type is used in the core to determine why completion was triggered. This is important because if completion was triggered automatically it will only fetch new completions if there aren't any or if a trigger character was typed. Otherwise it will just sort existing ones.