Update the docs to include gRPC .NET Core support for Identity.Web

[cmatskas]

Documentation related to component

Include gRPC for .NET Support in the docs

Please check all that apply

• typo
• [X] documentation doesn't exist
• documentation needs clarification
• error(s) in the example
• needs an example

Description of the issue

We test gRPC for .NET Core with Identity.Web and it's working great. Here's a blog post with a link to a repo that shows how to integrate Microsoft.Identity.Web with gRPC in .NET Core https://dev.to/425show/secure-grpc-service-with-net-core-and-azure-active-directory-4p6k

[jmprieur]

Work to be done:

1. Add a link to Christo's blog post in the wiki
2. Add a project template for the gRPC case.

[jmprieur]

Added a link to the wiki

[jennyf19]

included in 1.5.0 release