This change adds a phase which runs IR passes. Design and code are almost
exactly the same as the existing SyntaxTree phase. However all of this is
public because the IR is public API.
- Add an `HtmlNodeOptimizationPass` that does all of the `RazorSyntaxTreeRewriting` that legacy used to achieve outside of `TagHelper`s.
- Add tests for `HtmlNodeOptimizationPass` to verify it's executing appropriate bits.
#849
- Added a TagHelperFeature to hold TagHelper specific pieces that can be replaced.
- Built a syntax tree pass that applies the ported TagHelper bits.
- Updated tests that expected different RazorEngine defaults.
- Added new tests to verify binder pass.
Ryan Nowak
N. Taylor Mullen