Refactor Container customiztion and phantom slots & crafting grids

[brachy84]

• removes ContainerCustomizer
• ability to easily use a custom Container by overriding UIFactory#createContainer or using UISettings#customContainer (the later takes priority)
• canInteractWith function can now be customized by overriding UIFactory#canInteractWith or by using UISettings#canInteractWith (the later takes priority)
• IGuiHolder#buildUI has now a third UISettings parameter
• UISettings allows customizing the above two features and now holds the JEI settings. An instance is stored in ModularContainer and on client in ModularGuiContext
• phantom slots have now their own widget and sync handler class
• phantom slots still have an associated ModularSlots for convenience, but they are no longer added to Container#inventorySlots
• use static vars for sync ids in ItemSlotSH and FluidSlotSyncHandler
• change SlotGroupWidget#playerInventory() params to allow creating a player inventory without preset position
• move ItemSlot and FluidSlot to com.cleanroommc.modularui.widgets.slot
• create classes (CraftingModularContainer, InventoryCraftingWrapper and ModularCraftingSlot) to easly create crafting grids