Native Instance Support

[OutOfBears]

It would be nice for fusion to have native Instance support, and by that I mean the ability to use existing instances with Fusion. This would cut out the need to set every property inside fusion, and create a object inside studio, and only update properties that need to be updated in real time.

For Example:

local New, State = Fusion.New, Fusion.State
local TextState = State("Some text here :)")

New(existingInstance) {
    Text = TextState
}

[OutOfBears]

Dammit, duplicate issue

[dphfox]

Duplicate of #34