itemGroups.yml

Here's the modified file for registering creative mode item group tabs:

Item Group Configuration (itemGroups.yml):

groups:
  test_groups:
    name: "CoreExtensions"
    namespace: "coreextensions"
    id: "itemgroups"
    icon: "minecraft:grass_block"
# Add more item groups here using the following format:
# - namespace:item_id
# For example:
# - mymod:my_group
# - anothermod:another_group

In this file, you can add additional item groups by following the format provided and specifying their namespace and item IDs. These item groups will appear as tabs in the creative mode inventory for organizing and accessing items from your mod or extension.