Core - Refactor arsenal configs

[Kexanone]

When merged this pull request will:

• Factor out ACE arsenal item lists to separate shared config files
• Add priority-based sorting for lists.
• Add ACE_Sorting::InsertionSort for stable and adpative sorting.
• Add ACE_EntityCatalogMultiListEntry as an alternative to SCR_EntityCatalogMultiListEntry that can be used in standalone configs.
• Add ACE_OptionalEntityCatalogInventoryItem for inventory items that are only enabled if an optional addon is present.

Background:

• Originally each ACE mod overrode the arsenal config for each faction for adding new items, leading to a lot of duplication.