Icon for new built-in "Image Preview" Extension

[mjbvz]

As part of our custom editor work (#77131), I've moved our image preview into a built-in extension. This extension needs a simple icon

[miguelsolorio]

Would our generic "preview" icon work here?

Or do you think one with a picture inside would be better suited?

I'd be more inclined to use the generic one otherwise we could end up creating various versions for different types/

[mjbvz]

Either works for me. It's going to be pretty hidden in the UI so it doesn't need to be anything fancy

[miguelsolorio]

In that case let's go with the generic one, you can re-use the icons from the Markdown extension:

https://github.com/microsoft/vscode/blob/master/extensions/markdown-language-features/media/preview-dark.svg

https://github.com/microsoft/vscode/blob/master/extensions/markdown-language-features/media/preview-light.svg

[bpasero]

Fyi there is a few more built in extensions without icon:

[miguelsolorio]

@bpasero created #81760 to track that