Add support for zstd compressed jetstream

[Soulusions]

Simple addition of zstd compression support for jetstream, should be especially useful once more collections get added to it.
I added the ZstdSharp.Port library for actual zstd support, the dictionary is currently sitting in the root of the project as I wasn't 100% sure where to put it.
Last thing of note I guess is the slightly nasty msbuild wrestling I had to do that handle the dictionary (100% interested to know if there's a better way to do this than what I did).
Otherwise this has been working amazing from my personal testing with a personal project as well as the jetstream sample!

[drasticactions]

Thank you for the PR!

I think the library should be okay to use and in general I'm cool adding it. I think if you remove the hardcoded zst_dictionary and instead pass it in as a byte array parameter, then I'm 👍

[Soulusions]

Also this is simply a sidenote that's not very relevant in the current state of the project/jetstream itself, but later on if more collections get added to jetstream, it might be worth looking at using the multi-threaded API for ZstdSharp as the bandwidth on the websocket might grow in the future, who knows!

[drasticactions]

It should be on Nuget now: https://www.nuget.org/packages/FishyFlip/3.2.0-alpha.4

Thanks!