So with the release of the Paper MC Modernized 0.2.0 subset by @RandomLuisness I can finally proceed with the development of my mod, however before I can begin I decided to overhaul the inventory system to remain consistent with the vanilla inventory (and thus, also requires me to add boots). I managed to get the creative inventory nice and polished, but quickly ran into 2 bugs that needed to be patched. First, if you look at the image provided you may notice that the tiles aren't clipping to the grid correctly, despite present edits to the "GUI_pos" array. Secondly, in vanilla MC the main hotbar is present within all other GUI, however, the existing engine only allows it so that only 1 menu can be displayed at a time. Sadly, I imagine both of these bugs would require the creation of methods/functions beyond that of my expertise. I imagine once these 2 bugs are patched, they would enable better inventory switching, and with that comes the conclusion to the first (very, very, minor devlog).
@RandomLuisness - Original Fork, texture artist. @ottobunny - collaborator