- Previously we'd special case `@section` at code generation time; now we transform the directive into an IR node.
- Changed the expectations of `DefineSection` to not take in a section writer. It's now expected to modify what `Write`, `WriteLiteral` etc. write to when inside of the lambda. This is done today in TagHelpers via `StartTagHelperWritingScope`.
- Updated baseline files to reflect new `DefineSection` expectations.
- Updated IR tests since we no longer leave around `DirectiveIRNode`s.
#901
- Removed existing type names used to track `@functions`, `@section` and `@inherits`.
- Updated parsing logic to reflect existing directive behaviors.
- Added additional IR and syntax tree pass in order to fulfill the default directive expectations.
- Updated tests to to expect new extensible directives parse structure.
#894