Seshat's Gambit should make a copy of the FrameForEach instead of mutating it in-place

[object-Object]

Seshat's Gambit currently relies on the interior mutability behaviour of FrameForEach.acc to pop the iota from the accumulator:

Ephemera/common/src/main/java/net/beholderface/ephemera/casting/patterns/OpThothYoink.kt

Lines 24 to 27 in 1faefe4

	val accumulator = frame.acc
	if (accumulator.isNotEmpty()){
	output = accumulator.removeLast()
	}

While this currently works, it will break in the next Hex Casting patch, since we're switching Thoth to use an immutable TreeList internally in FallingColors/HexMod#1031.

To ensure it still works as documented after this patch, OpThothYoink should instead use frame.copy() to copy the frame construct a new FrameForEach (frame.copy() won't work - acc will no longer be a dataclass field) with an updated version of the accumulator, and create a new continuation with the frame replaced.