Make items in your inventory go into config

I need some help with my plugin: StarCache
Currently you have to add items into the config, so it will make different crates fall. Well currently you have to add them into the config, how could i make it so you can just type a command i'll make "/starcache input" and it'll add all the items in your inventory as a new crate
Config:

Code:

general:
##################################################
# Time Between each Star Cache Event. #
# Expressed in Seconds #
##################################################
eventCooldown: 43200
##################################################
# Radius is caclulated in a square #
# Values will be +- the defined #
##################################################
world:
radius: 5000
##################################################
# DO NOT TOUCH #
##################################################
lastEvent: 0
##################################################
# Are we using Factions to determine #
# safe areas? #
##################################################
useFactions: true
##################################################
# How should we broadcast coordinates? #
# By CHUNK or EXACT? #
##################################################
announcer:
method: CHUNK
caches:
netherstar:
- 399%1
blocks:
- 57%32
- 41%32
- 42%32

the end where it says "caches:" is where i want to add the command so i can input items into the starcache, i've never worked with something like this in a plugin so some help would be nice!
If someone is confused on what i mean just message me and i'll try to explain better

 

@immensebuttpain
Get the inventory contents, loop through them and create a new crate...