[Discussion] Create Remora.Sdk.Web and Remora.Sdk.Razor

[TheBrambleShark]

The idea between these two SDKs is to marry Remora.Sdk with Microsoft.NET.Sdk.Web and Microsoft.NET.Sdk.Razor, respectively.

Currently, this is possible using a project file like the following, but this can cause issues with compatibility (see #13) and general jank. I assume that the project system isn't really designed to handle multi-targeting Sdks in this manner.

<Project>
    <Import Project="Sdk.props" Sdk="Microsoft.NET.Sdk.Web" />
    <Import Project="Sdk.props" Sdk="Remora.Sdk"/>

    <!-- Omitted project stuff -->

    <Import Project="Sdk.targets" Sdk="Microsoft.NET.Sdk.Web" />
    <Import Project="Sdk.targets" Sdk="Remora.Sdk" />
</Project>