* Pokemon RB: Add an item group for each HM
HMs are suffixed with the name of the move, e.g. "HM02 Fly". If TM
move are randomized, they do not have the move name, e.g. "TM02".
If someone hints for an HM using the just the number, the fuzzy matching
sees "TM02" as closer than "HM02 Fly", and in fact sees it as close
enough to not ask the user to confirm, leading them to waste hint points
on non-progression item that they didn't intend.
Emerald already does this for this reason, adding the same for RB.
* Add the new groups for HMs in the item_table instead
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