Swift 6 and concurrency update

[Cordavi]

What it Does

• Updates Networking to have strict concurrency turned on as well as Swift 6
• Goes through and conforms various types to Sendable

How I Tested

• Built the app, ran the test repeatedly 100 times to make sure they pass
• Tried using this update in Provider

Notes

• There is an issue where if you call one of the combine based network calls from the main thread and then do things on any other thread as part of the returned combine chain, the app will crash without a compiler warning. Used @MainActor to enforce it being called from the thread and then always receiving on that thread. I can't scope it to something like the MainQueueScheduler we have in ViewStore, so I updated the docs to call it out.

[Cordavi]

These seem to be the get called even when you conform the type which causes unexpected behavior. Removing them so you have to determine what you want.

[Twigz]

Make sure we mark the next version as a new major version then, as this is a breaking change.