Geometric Deep Learning: VTK dataloader, mesh utilities, file format converters

[mnabian]

Modulus Pull Request

Description

Closes https://github.com/NVIDIA/modulus/issues/500

Checklist

• [x] I am familiar with the Contributing Guidelines.
• [x] New or existing tests cover these changes.
• [x] The documentation is up to date with these changes.
• [x] The CHANGELOG.md is up to date with these changes.
• [x] An issue is linked to this pull request.

Dependencies