This change makes it so that we no longer create 'design time' engines.
The choice of design time or runtime is made when we initiate a code
generation operation.
Options instances are now created as part of the CodeDocument
initialization. Our existing code can still be created using a
RazorEngine so our passes that initialize the options still support the
old code path.
- Prior to this imported `@page` directives would flow through the Razor system without error. This resulted in inconsistent behavior between MVC and Razor. Now, imported `@page` directives result in diagnostics on the page directive node.
- Added two tests to verify that we still treat views with imported page directives as Razor pages BUT we also log a diagnostic on the page directive node.
- Renamed the `ViewComponentDiagnosticFactory` class to `RazorExtensionsDiagnosticFactory` so it can be used for more than just view component diagnostics. This way we can ensure that our diagnostics don't end up overlapping.
#1503
- Added an inner pass inside of the intermediate lowering phase to determine which directives get flowed to the final document. There were many ways to accomplish this but in order to keep the last wins mechanic for non-auto imported directives I had to let the directives get created and then removed based on if they were inherited.
- Added error case if a user attempts to import a block directive with a `FileScopedSinglyOccurring` directive usage.
- Added test cases that validate directives are properly inherited at the intermediate lowering phase.
- Updated a few tests that had incorrect assumptions.
- Left the default directive passes alone in regards to determining the "imported" directive to enable users to add their own model, inherits, etc. directives that take precedence.
- Normalized the passes in the intermediate lowering phase to handle directives identically (we don't conditionally lower anymore).
#1376