feat: ✨ icon for ruff config file

[lucas-labs]

Description

File Icon for ruff config file.

Closes: #2755

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[lucas-labs]

In my fork, I had two variations for light and dark themes using light green and purple, both quite similar to those used in the ruff logo:

But here I went with a 1 svg file solution using a darker green.

Let me know what you guys think.

[PKief]

I always prefer it, if we keep it simple and have a single color for dark and light theme only. So from my point of view this icon looks very nice. Thanks for the contribution!

[github-actions]

Merge Successful

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