Add API to provide debugger variables for ContinuationFrame subclasses

[object-Object]

This feature would replace the following code:

HexDebug/Common/src/main/kotlin/gay/object/hexdebug/debugger/HexDebugger.kt

Lines 224 to 245 in 3a4f473

	return when (val frame = continuation.frame) {
	is FrameEvaluate -> sequenceOf(
	toVariable("Code", frame.list, sourceLine),
	toVariable("IsMetacasting", frame.isMetacasting.toString()),
	)
	is FrameForEach -> sequenceOf(
	toVariable("Code", frame.code, sourceLine),
	toVariable("Data", frame.data),
	frame.baseStack?.let { toVariable("BaseStack", it) },
	toVariable("Result", frame.acc),
	).filterNotNull()
	is FrameBreakpoint -> sequenceOf(
	toVariable("StopBefore", frame.stopBefore.toString()),
	toVariable("IsFatal", frame.isFatal.toString()),
	)
	else -> if (sourceLine.isNotEmpty()) sequenceOf(
	toVariable("Code", sourceLine),
	) else null
	}