feature: allow image in CV header (via URL)

[catabozan]

I have added a new property called image that can be set via the MarkDown attributes.

You can set the image to any URL and it will be displayed on the left side of the header text.

If no image is present or if it's not a valid url, it will not be displayed and the layout stays the same as the current one.

[Renovamen]

Hi @catabozan, thank you for your pull request!

Adding an image is a great feature. However, before we move forward, I think we need to consider how to adjust the resume header styles when adding an image. Right now, the styles don't center the header or align it to a side, which could be improved. I don't have a clear idea yet on how to style headers with images, so I'll need some time to think about it and possibly refine this pull request before approving it.

Do you have any thoughts on this? Thanks again!