fix: hide opposing players cards in the gamestate

[farisT]

• Removed the hideWhenFaceup element (remnant from jigoku engine)
• Return facedown cards with no details based off active player and zone (e.g. only show opposing cards when they are in play)

[danbastin]

Condition looks right to me. This should be good to g.

[AMMayberry1]

Just a note - please don't force push if at all possible, it erases the review history and makes it harder to identify the new changes.