Extract WebCrypto library

[MattFromGer]

Hey Eugene,
what do you think about extracting the WebCrypto library into its own repo (e.g. in BlazorExtensions) and adding Nuget specs to the .csproj file, so it can be released on Nuget?
I want to use it, but right now I would need to copy the code to my project.

[ebekker]

Actually, that was already discussed back when this project was first created over here.

Now that was almost 2 years ago now, and things have definitely come a long way for Blazor since then, so pby setting something up now would be much easier. The blocker back then was this caveat posted by @galvesribeiro:

The only problem with it, which was actually found on BE.SignalR and BE.WebUSB, is the lack of Uint8Array proper serializer on Mono/Blazor and that may cause perf issues on big byte[] marshalling.

I'm not sure if that's addressed now, do you know?

[galvesribeiro]

I'm not sure the marshalling issue was fixed. Will have a look at it over the weekend.

[ebekker]

I guess either way, if it's not fixed, could be implemented with the current kludge if necessary.