Rename LiveSubmitButton to LiveButton

[bcardarella]

Similar to HTML, we should support:

<LiveButton type="submit"> and <LiveButton type="reset">

[carson-katri]

Would <LiveFormButton> work, so its more related to the library?

I assume most people would use the <.button> component anyways.

[bcardarella]

I think I want to go with LiveButton

[bcardarella]

Let's keep LiveSubmitButton but it will log a deprecation warning and delegate to LiveButton type="submit"