Provide ability to remove, or change, the Node Pin icon.

### What problem are you experiencing?

The red pin icon that appears when a Node is pinned, is aesthetically unappealing.

It would be good to give users the ability to hide it; change its color; and/or change the icon itself.

### When does this problem occur?

everyday

### How often do you encounter this problem?

Daily

### How much does this problem affect your workflow?

Minor annoyance

### Current workarounds

I've chatted with Gemini;

It seems the icon is drawn via code, and is not its own .svg / image file.

I can't find the file responsible for it.

Nor can I figure out how to modify it.

### Ideas for solutions (Optional)

_No response_

### Additional context

_No response_

┆Issue is synchronized with this [Notion page](https://www.notion.so/Issue-9138-Provide-ability-to-remove-or-change-the-Node-Pin-icon-3106d73d365081769b59c6b10c9d8721) by [Unito](https://www.unito.io)