Add DiT to the entry points to the model registry

[CharlelieLrt]

PhysicsNeMo Pull Request

Description

Add the DiT to the model registry.

Checklist

• I am familiar with the Contributing Guidelines.
• New or existing tests cover these changes.
• The documentation is up to date with these changes.
• The CHANGELOG.md is up to date with these changes.
• An issue is linked to this pull request.
• If I am implementing a new model or modifying any existing model, I have followed the Models Implementation Coding Standards.

Dependencies

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[greptile-apps]

Greptile Summary

This PR registers the DiT (Diffusion Transformer) model in the PhysicsNeMo model registry by adding a single entry-point line to pyproject.toml.

• Adds DiT = "physicsnemo.models.dit:DiT" under [project.entry-points."physicsnemo.models"], enabling registry-based model discovery. The target module and class exist and are correctly exported from physicsnemo/models/dit/__init__.py.

Important Files Changed

Filename	Overview
pyproject.toml	Adds a DiT entry to the [project.entry-points."physicsnemo.models"] section; the target module physicsnemo.models.dit:DiT exists and exports DiT correctly.

_{Reviews (1): Last reviewed commit: "Add DiT to the entry points to the model..." | Re-trigger Greptile}

[CharlelieLrt]

Replaced by #1680.