Adds a loader (with shadow copying in server mode) based on the Roslyn
Analyzer loader design.
Adds some targets to the Razor SDK that we can use to compute the
configuration and extensions.
Passes all of the metadata through to the command line tools so they can
deal with extensions.
- Added APIs to retrieve an `ITextBuffer` from a `Document` and to retrieve a `RazorCodeDocument` from an `ITextBuffer`.
- The `RazorCodeDocument` from `ITextBuffer` API supports both the new and old Razor parsers so we can transition seamlessly between the two.
- Added logic in the `RazorDirectiveCompletionProvider` to consume descriptions from `DirectiveDescriptor`s. This is then surfaced via tooltips.
- Retrieved currently active `RazorCodeDocument` given a Roslyn buffer and harvested all directives to display in the completion list.
- Added unit tests to validate each new services functionality.
#291
- 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