fix: fix bitwise shift precedence in ANIMAL_MASK and related logic

[voronor]

I noticed an issue with the bitwise shift operations in the ANIMAL_MASK constant and a similar line in the setAnimalAndSpin function. The expression 160 + 16 was being evaluated first due to operator precedence, resulting in an unintended shift of 176 bits instead of the intended 160 + 16 bits.

I’ve fixed this by adding parentheses to ensure the correct order of operations. This ensures that the mask and related logic work as intended, preventing potential issues with data extraction and storage in the carousel mapping.

Changes:

1. Updated ANIMAL_MASK to use parentheses:

   uint256 constant ANIMAL_MASK = uint256(type(uint80).max) << (160 + 16);  

2. Fixed the shift operation in setAnimalAndSpin:

   carousel[nextCrateId] = (carousel[nextCrateId] & ~NEXT_ID_MASK) ^ (encodedAnimal << (160 + 16));  

This should resolve the issue and ensure the contract behaves as expected.