feat(fifa17): map training subtypes to attribute slots

Which attribute a FIFA 17 training card trains is recoverable after all --
not from a table, but from the client's own dispatch: `FUN_18013f4d0`
derives a consumable's whole presentation from `cardsubtypeid` and writes an
attribute selector to `rec+0xbc`. Paired with `fcc_trainingcards.amount`
(TABLE_PROVEN, matching the wire 8/8), that settles both halves of the
effect for all 36 attribute training cards -- 12 families x 5/10/15, 18
goalkeeper and 18 outfield.

The subtype order is NOT the slot order: 54 is SPEED at slot 4 while 56 is
REFLEXES at slot 3, and 65 is HEADING at slot 5 while 66 is DEFENDING at
slot 4. Reading them sequentially trains a different stat from the one on
the card, invisibly, so the table is explicit and a test pins those four.

The two SQUAD training cards (57, 67) share the table and the client's
training UI bucket but are the only ones whose single-target byte is 0: they
act on a squad and move fitness, not an attribute. They resolve to None and
fail closed rather than being mistaken for a +3 attribute card.

A keeper's six slots mean DIV/HAN/KIC/REF/SPD/POS and an outfielder's mean
PAC/SHO/PAS/DRI/DEF/PHY -- same numbers, different attributes -- so the
class gate is not cosmetic.

openfut-adapter-fifa17/src/fut/mod.rs

@@ -27,3 +27,4 @@ pub mod squad_ext;
 pub mod squad_projection;
 pub mod store_catalog;
 pub mod store_session;
+pub mod training_cards;