Adds a callback to change/override the pick block result.

[Tcat2000]

Description

Adds a callback to change the pick block result.

Example Script

StartupEvents.registry("block", event => {
    event.create('example_block')
        .property(BlockProperties.AGE_4)
        .pickBlock(event => {
        	if(event.state.getValue(BlockProperties.AGE_4) == 4) event.setPickBlockItem("minecraft:stone");
        	else event.setPickBlockItem("kubejs:example_block");
        })
       ...

Other details

I am not familiar on callbacks, so if there is a way to have 'return' in the callback return the string, instead of 'event.setPickBlockItem' that would be an improvement, but I'm not sure how to do that myself.

[Tcat2000]

Ignore all of the older commits, they were reverted for this pr

[ChiefArug]

This javadoc is very wrong

[ChiefArug]

Why is there no way to get a BlockContainerJS from here? Typically these callbacks provide one of those rather than the individual components that make it up such as BlockGetter, BlockState and BlockPos. Have a look at the other existing callbacks.

[Tcat2000]

Alright, will do that.

[ChiefArug]

Looks like some random imports got added, you can run 'Optimise Imports' in Intellij to clean them up.