Optimize layer iteration to prevent performance overhead.

[NonSwag]

Overview

Clamp the min and max y values to the min and max values of the chunk

Description

Adjusted the layer iteration logic in the Region class to use the minimum and maximum Y-values from the chunk. This prevents unnecessary iterations when getMinimumY or getMaximumY returns extreme values, improving performance efficiency.

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[NonSwag]

I was not sure whether it would be more appropriate to use getMinSectionPosition or getMaxSectionPosition over getMinY or getMaxY
Input on that would be appreciated

[PierreSchwang]

Would be great if the variables would either be called minY instead of minLayer or keep them minLayer but put the bit shift directly after the Math.min/max instead of inside the loop - just so that the naming fits