Description
Also adds the option to search all chests that you opened in the world with this client open, this can reduce the time spend on searching and sorting item in your inventory/stash.
As said in a Ximuvoid Video 41 secs in, https://www.youtube.com/watch?v=zJtJ90Vl03M&t=41s One of Minecraft's greatest barriers in creative building in survival mode is the choice of hundreds and hundreds of blocks sprawled out around a player's stash. I think such a quality of life improvement sure does benefit those with little time playing Minecraft.
One mod that you can get inspired from is https://www.curseforge.com/minecraft/mc-mods/inventory-profiles-next
For the client to save chest data, I suggest looking at pokechu22's world downloader code for hints to make that happen.