Attempt to fix unique merchants not being proper "hint" types

[flagrama]

Messes up Text Shuffle: Except Hint

I tried to modify the existing unique merchants "hint" text changes to use the existing hint framework. It's a little awkward being a bunch of settings under one misc hints setting so some extra work was needed.

This has not been tested and I know almost nothing about how hints are actually supposed to work, so this'll need a thorough review as well.

[flagrama]

There's almost certainly some better way to only apply these hints if the setting is enabled than what I'm doing for example.

[fenhl]

Upon review, this seems more like a new feature, since it marks items on these locations as already hinted, thus preventing gossip stones from also hinting them. To fix text shuffle, adding the message IDs to hint_ids would be enough.

[cjohnson57]

I like that it moves hint data out of Patches.py

To make sure I'm understanding correctly, adding the hint logic means that hints won't be duplicated onto gossip stones?