Allow Shuffling a Group of Selected Cards and Placing Them X Cards From the Top or Bottom of the Deck

[odama626]

Enable players to shuffle a group of selected cards and place the shuffled group X cards from the top or bottom of the library.

Acceptance Criteria:

Players can multi-select cards to shuffle into a group.
After shuffling, the group is placed a specified number of cards from the top or bottom of the library.
Positioning is hidden from the player (e.g., no peeking or revealing).
Use Cases:

Cards like Approach of the Second Sun, Oust, or Teferi, Time Raveler, which require precise positioning in the library.
Supports mechanics where specific placement and hidden randomness are required.