JSON-defined dialogs require world relog to reload

When modifying data pack files, for everything else, /reload will properly load the latest changes to the enabled datapacks into the world. However, when dialogs are defined via JSON files in the datapack, and they’re modified while the world is running, /reload doesn’t actually load in the new changes. Instead, a full world exit and relog is required to pick up the latest changes, which makes development with dialogs very slow and tedious.