ExecutableItems

SCore:

• Refactored logic for checkamount placeholder
• Added checkvar as substitute for checkitem's placeholders (checkitem can't detect doubles and I'm not gonna submit a PR to checkitem)
• Made a custom argument extractor so it doesn't have complications when dealing with arg inputs that contains underscores

ExecutableItems: Added placeholders for PLAYER_PICKUP_ITEM

%item_type% : Returns Material value %item_name% : Returns ItemStack display name %item_amount% : Returns ItemStack amount %item_cmdata% : Returns custom model data value %item_cmdata_f_0% : Returns the first value of the floats custom model data array %item_cmdata_s_0% : Returns the first value of the strings custom model data array

By Special70 😎