Variable FOLDER_DOCUMENT_TYPES`Const`

FOLDER_DOCUMENT_TYPES: readonly [
    "Actor",
    "Adventure",
    "Item",
    "Scene",
    "JournalEntry",
    "Playlist",
    "RollTable",
    "Cards",
    "Macro",
    "Compendium",
] = ...

Define the allowed Document types which Folders may contain