Converting rect node to frame ignores rect's layer opacity.

[softmarshmallow]

on nodes-on-rect-convert.ts

  if (rect.visible !== false) {
    // FIXEME - on converting fills, it does not handles the rectnode's layer opacity. so dimmed color rect will be convered as non-dimmed color frame node.
    frameNode.fills = rect.fills;
    frameNode.fillStyleId = rect.fillStyleId;

    frameNode.strokes = rect.strokes;
    frameNode.strokeStyleId = rect.strokeStyleId;

    frameNode.effects = rect.effects;
    frameNode.effectStyleId = rect.effectStyleId;
  }