Beautify GPT suggestion style and add GPT logo file

[zhou9584]

Linked GitHub issue ID: #

Pull Request Checklist

• Tests for the changes have been added (for bug fixes / features)
• Code compiles correctly with all tests are passed.
• I've read the contributing guide and followed the recommended practices.
• Wikis or README have been reviewed and added / updated if needed (for bug fixes / features)

Does this introduce a breaking change?

If this introduces a breaking change for Hydra Lab users, please describe the impact and migration path.

• Yes
• No

Pull Request Description

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Please check the type of change your PR introduces:

• Bugfix
• Feature
• Technical design
• Build related changes
• Refactoring (no functional changes, no api changes)
• Code style update (formatting, renaming) or Documentation content changes
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Feature UI screenshots or Technical design diagrams

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