Define API reference documentation

[pepone]

What should we put on the API reference index page?

https://api.testing.zeroc.com/csharp/api/index.html defined in https://github.com/icerpc/icerpc-csharp/blob/main/docfx/api/index.md

There is also:

https://api.testing.zeroc.com/csharp/index.html defined in https://github.com/icerpc/icerpc-csharp/blob/main/docfx/index.md

Maybe we can redirect this one to the main doc?

[pepone]

The API link now points to the main namespace https://api.testing.zeroc.com/csharp/api/IceRpc.html

[bernardnormier]

I believe it's fixed.

[pepone]

We need to decide what we do for https://api.testing.zeroc.com/csharp/index.html