Model: HERO ADDED

[1BIMU]

Description

HERO model has been added to the repository. It has reach the baseline performance under the task of node_classification

Checklist

Please feel free to remove inapplicable items for your PR.

• [√ ] The PR title starts with [$CATEGORY] (such as [NN], [Model], [Doc], [Feature]])
• [ √] Changes are complete (i.e. I finished coding on this PR)
• [√ ] All changes have test coverage
• [ √] Code is well-documented
• [ √] To the best of my knowledge, examples are either not affected by this change, or have been fixed to be compatible with this change
• [ √] If the PR is for a new model/paper, I've updated the example index here.

Changes