Consider swapping backs of sz4 and t4 tapestry cards

[garykac]

In the spell cards list, there is a note about the sz4:

    # +---------+       +---------+
    # |    X  X |  <->  | X  X    |
    # | X  X    |       |    X  X |
    # +---------+       +---------+

and t4:

    # +---------+       +---------+
    # | X  X  X |  <->  | X  X  X |
    # |    X    |       |    X    |
    # +---------+       +---------+

tapestry cards indicating that they are the only 2 cards that cannot cast a few Neutral 2 patterns:

    # +-------+  Level 1 - Castable on all starting cards except  xx  xx
    # | X . X |                                                  xx    xx
    # +-------+
    'N2-3':     [   "X . X",
                ],

    # +-------+  Level 1 - Castable on all starting cards except  x    x
    # | X . . |                                                  xxx  xxx
    # | . . X |
    # +-------+
    'N2-4':     [   "X . .",
                    ". . X",
                ],

However, if the backs were swapped to make st4 and zt4 cards, then these patterns would be castable on all cards.

It would probably end up adding 3 more cards to the tapestry deck (since there are currently only 3 t4 and 6 sz4 cards.

And possibly do the same for the l4 and ldot4 patterns as well.