Adds JEI support for viewing villager trades, with automatic compatibility for custom villager trades and trades offered by other entities, such as Goblin Traders.
By default, villager trades for JER and ALI will be turned off, but you can turn them back on in the config file.
When entering a world, all trade offers are scanned asynchronously. Once the scan is complete, a JEI category is generated. This process does not affect the game's main thread.
You can use /jeitrade rebuild to generate a cache file, preventing the trades from being scanned every time you enter a world. However, if any trade offers are added or updated, you must run the command again manually to refresh the cache.
