add features and fix item warning

[eygwi]

Summary

This PR refactors the Generator and Machine system to support Tiers and dynamic Lore. Additionally, it fixes the "Illegal Stack Size" console warnings caused by custom items in SlimeCustomizer.

Changes

1. Generator System

• Added: Tier system and dynamic Lore generation based on config.

2. Machine System

• Added: Tier system, speed sytem and dynamic Lore generation based on config.

3. Bug Fixes (SlimeCustomizer)

• Fixed: "Illegal Stack Size" warning in console (e.g., for BAMBOO_STRING).
• Technical Detail: Modified NPCustomSCItem.java and CustomSCItem.java to force the base item stack size to 1 during registration, while preserving the original amount in the recipe output via cloning.

4. Fix category GUI crash and implement pagination

• Fixed IndexOutOfBoundsException when opening /slimecustomizer categories with many Slimefun addons installed.
• Replaced the static single-page GUI with a paginated system to support unlimited categories.

Related Issues

• Resolves Add Machine Speed to machine stats #56
• Resolves /sf categories throws error when there are more than 54 categories #49
• Resolves item-amount stacking error #36

Testing

• Verified that Generators and Machine now correctly display Tiers and Lore.
• Verified that console warnings for custom items with amount > 1 are gone.
• Confirmed that crafting recipes still output the correct amount (e.g., 6 items).