* Upgrade Microsoft.OpenApi dependency to 1.4.3
* Update tests to use copy constructors

* Infer response metadata in RequestDelegateFactory

* Update OpenApiRouteHandlerBuilderExtensionTests

* Infer 200 status despite HttpContext and HttpResponse parameters

* Remove dead code

* Add support for running final conventions during build

* Fix typo and use stack for backing store

* Update application order and address feedback

- Fix ordering of group and entry-specific conventions in parameter list
- Update to use FIFO ordering within finally conventions of the same level
- Add tests for WithOpenApi on group and endpoint
- Revert to using List instead of Stack for convention
- Fix ordering of outer and inner group in RouteGroups

* Add new test

* Update tests

* Remove generation of schemas in OpenAPI package

* Update src/OpenApi/test/OpenApiGeneratorTests.cs

Co-authored-by: Damian Edwards <damian@damianedwards.com>

* Update tests

Co-authored-by: Damian Edwards <damian@damianedwards.com>

* Add Microsoft.AspNetCore.OpenApi package

Fix up schema type generation

Post review polish

Add new package to templates

Split out SchemaGenerator

Clean up usings

* Address feedback from peer review

* Move OpenApi package to top-level directory in src

* Clean up HttpAbstractions filter

* Update ProjectReferences and templates

* Fix up ProjectReferences and address feedback

* Add new directory to Build.props and clean up sln