- Added `DirectiveUsage` to enable extensible directive authors to indicate how their directives should be used. Currently support `Unrestricted` (how section directives have always worked) and a file scoped singly occurring directive.
- Added directive parsing tests.
- Removed no longer used `BlockKindInternal` items.
#1376
Created internal + public versions of
- BlockKind
- SpanKind
- AcceptedCharacters
That way these types are only exposed through the VS apis and not
through the runtime API surface.
Also deleted RazorEditorParser. Yep. It's going to take significant work
to just port it to the language services assembly. Let's reevaluate this
when we get closer to the next foundational update.