Suggested to add the "node color" or "node grouping" feature

[massif-01]

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1. Is this request related to a challenge you're experiencing? Tell me about your story.

In complex workflow designs, especially after using classification tools, too many nodes can overwhelm users during debugging. It is suggested: 1.Nodes can be assigned different colors to facilitate distinguishing nodes within the same category. 2.Consider the design approach of ComfyUI, which allows users to select and group nodes, and also provides the option to assign colors to these groups.

2. Additional context or comments

No response

3. Can you help us with this feature?

• [ ] I am interested in contributing to this feature.