Added POKEMART_LIST_END to avoid users accidentally removing it

[AsparagusEduardo]

Description

Previously, because it had the ITEM_/DECOR_ prefix, users would mistakenly remove it from their custom mart lists.
This should hopefully aleviate the issue.

Discord contact info

AsparagusEduardo

[GriffinRichards]

I think this could be much more useful not as an alias of ITEM_NONE, given this isn't that much more visually distinct from the end of the list, and it's very unlikely anyone would redefine it. It might be more useful to define something like this:

.macro POKEMART_LIST_END
    .2byte ITEM_NONE @ (or generically .2byte 0)
    release
    end
.endm

So that A. it would be more visually distinct from the end of the list:

    .2byte ITEM_CARBOS
    .2byte ITEM_HP_UP
    POKEMART_LIST_END

and B. so the unnecessary release and end are hidden and can be removed by editing one location.

[AsparagusEduardo]

Good idea! Since it's gonna be a macro, would pokemartlistend be a better name for it?

[GriffinRichards]

Since it's gonna be a macro, would pokemartlistend be a better name for it?

Up to you

[AsparagusEduardo]

13-month PR comeback babyyy!