Auto-detect McGrubber stacks

[LJNeon]

Adds a new option (enabled by default) to auto-detect how many McGrubber Burgers the player owns in three different ways:

1. From /sblevels
2. From talking to the Motes Grubber
3. When picking up an orb in the rift

This updates the existing stack count option, it doesn't cache the value elsewhere.

Would like to note that I have no experience with java or minecraft modding so a more in-depth review of the code is likely a good idea.

Testing

Tests for 1st detection method

Set stack count to an incorrect value:

Open consumble items in /sblevels:

Stack count is corrected:

Tests for 2nd detection method

Set stack count to an incorrect value:

Talk to the Motes Grubber:

Stack count is corrected:

Tests for 3rd detection method

Set stack count to an incorrect value:

Pick up an orb in the rift:

Stack count is corrected:

Enigma's Crib orbs don't cause any issues:

Tests to confirm disabling the option works

Set stack count to an incorrect value & disable the auto-detect option:

Talk to the Motes Grubber:

Stack count remains unchanged: