Add vesuvius-sheet-tools to community projects (Segmentation tools)

[IyanDopico]

Adds vesuvius-sheet-tools to the Segmentation tools list.

CPU-friendly, multi-scroll tools that work directly on the official m7 surface predictions, streaming from the open S3 bucket (no downloads, no GPU needed):

• Cleaning: CT-mask gating + small-component removal. Measured on the official predictions: ~66% of predicted voxels were outside the CT mask on Scroll 3 (PHerc0332) and ~50% on PHerc1218, plus 150k-230k noise components per crop.
• Sheet-instance separation: distance-transform watershed with a calibrated merge criterion for over-segmentation (border-salience with an anti-percolation guard; calibration table in the README). On PHerc1218 (no human segments yet): 491→391 instances on a central crop with the largest instance at 4.6% of the mask; results reproduced across independent environments.

Repo: https://github.com/IyanDopico/vesuvius-sheet-tools (MIT)

[vercel]

@IyanDopico is attempting to deploy a commit to the scroll Team on Vercel.

A member of the Team first needs to authorize it.