add support for hsv tissue segmentation

[clemsgrs]

based on parameters detailed in "PRISM: A Multi-Modal Generative Foundation Model for Slide-Level Histopathology" (https://arxiv.org/abs/2405.10254):

To estimate the amount of tissue in a tile, each WSI is downsampled (...) and every pixel of the downsampled image is evaluated as to whether its hue, saturation, and value are within [90, 180], [8, 255], and [103, 255], respectively.