Add ability to send actions / return effects using `UITransaction`

[juliensagot]

Adds methods to send actions and return effects using UITransaction:

return .run { send in
   await send(.buttonTapped, uiKitAnimation: .easeInOut)
}

return .run { send in
   await send(.buttonTapped)
}
.uiKitAnimation(.easeInOut)

return .run { send in
  await send(.buttonTapped, transaction: UITransaction(animation: .easeInOut))
}

var transaction = UITransaction()
transaction.uiKit.disablesAnimations = true

return .run { send in
  await send(.buttonTapped)
}
.transaction(transaction)

store.send(.buttonTapped, uiKitAnimation: .easeInOut)
store.send(.buttonTapped, transaction: UITransaction())

// ViewActionSending
send(.buttonTapped, uiKitAnimation: .easeInOut)
send(.buttonTapped, transaction: UITransaction())

[juliensagot]

@stephencelis That definitely makes sense! I hadn’t thought about creating an external package, but I think it’s a good idea. The more platform-agnostic TCA is, the better.