Add Teeth3DS Dataset Integration

[crns-smartvision]

This pull request integrates the Teeth3DS dataset into PyTorch Geometric. Teeth3DS is a curated dataset for 3D teeth segmentation and labeling, and 3D landmark detection, featuring over 1900 3D scans acquired with intraoral 3D scanners.

For more details about the dataset and its purpose, visit the official Teeth3DS webpage

[abenhamadou]

Dear Jinu Sanil @wsad1
We want just to let you know that the pull request is ready now, all checks have passed.
Thank you for your efforts. best regards

[wsad1]

Add unit tests similar to https://github.com/pyg-team/pytorch_geometric/tree/master/test/datasets.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 85.58%. Comparing base (c211214) to head (1678f16).
⚠️ Report is 117 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #9833      +/-   ##
==========================================
- Coverage   86.11%   85.58%   -0.54%     
==========================================
  Files         496      498       +2     
  Lines       33655    34150     +495     
==========================================
+ Hits        28981    29226     +245     
- Misses       4674     4924     +250     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.

[Copilot]

Pull Request Overview

This PR integrates the Teeth3DS dataset into PyTorch Geometric to support intraoral 3D scan segmentation, labeling, and landmark detection. Key changes include:

• Implementation of the Teeth3DS dataset class with custom processing logic.
• Update of the initialization and file processing routines.
• Addition of tests and dependency management for the new dataset.

Reviewed Changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
torch_geometric/datasets/teeth3ds.py	New dataset class implementation and file processing routines.
torch_geometric/datasets/init.py	Updated to include Teeth3DS in available datasets.
test/datasets/test_teeth3ds.py	Added basic tests ensuring dataset integrity and core functionality.
pyproject.toml	Included new dependency "fpsample>=0.3.3".
CHANGELOG.md	Changelog updated with the new Teeth3DS dataset integration entry.