Enable MinimalApi for OData design

[xuzhg]

This is the design draft to support minimal API.

Seeking for reviews and feedbacks.

Don't hesitate to leave your comments in the PRs.

If you want to try the changes, just fetch it from the branch https://github.com/OData/AspNetCoreOData/tree/miniApi_9x.

Try the 'ODataMiniApi' project from the AspNetCoreOData.sln.

It's not finished yet and I will update this branch frequently.

[Lonli-Lokli]

How will it work with versioning? Using this https://github.com/dotnet/aspnet-api-versioning

[Kebechet]

@xuzhg Is there an ETA when this can be released ? at least as a prerelase version or temporarely as completely different nuget ?