[implemented] Function to query TradeSkillType, ResearchLineIndex and TraitIndex

[thifi]

I would like to be able to query an item for Research related information. Something like this:

local tradeSkillType, researchLineIndex, traitIndex = 
              GetItemResearchInfo(bagId, slotIndex)

or

please add this information to the item link so that i can extract myself:

instead of
[[|H2DC50E:item:45189:3:7:5365:3:7:0:0:0:0:0:0:0:0:0:4:0:0:108:0|hmaple inferno staff of frost^n|h]]
do this
[[|H2DC50E:item:45189:3:7:5365:3:7:0:0:0:0:0:0:0:0:0:4:0:0:108:0:6:4:5|hmaple inferno staff of frost^n|h]]

[Vuelhering]

This would be excellent.

I was just digging around for some function like that, but cannot find anything.