🚀 Feature Request: Ability to change the color of the query icon.

[hiroki]

Please confirm the following:

• I have carefully read the README
• I have searched through the issues page and didn't find a similar feature request.(Including issue that has been closed)
• Easydict has been upgraded to the latest version.

Feature description

The query icon is very hard to see when selecting text in dark mode on Mac. I would like the ability to change its color. Below is an example.

Use case (optional)

No response

Proposed solution (optional)

No response

Are you willing to submit a PR to implement this feature

• I'm willing to submit PR!

[github-actions]

Hello hiroki, Thank you for your first issue contribution 🎉

[tisfeng]

The icon is actually an image, I'll look into being able to let users customize the icon later.