adding code block to dynamically change tip badge based on theme

[digitalghost-dev]

Hey, I found out that you can change an image based on dark/light mode in a markdown file on GitHub so I think this would be great for the Tip badge. I'm wanting to add this to your repo!

I found out about this Stack Overflow

[Mqxx]

Nice but does this also work on SVGs?

[Mqxx]

I will look into this

[Mqxx]

I think i will update it for all badges.

[Mqxx]

@digitalghost-dev I have updated all badges according to your suggestion

[digitalghost-dev]

Sounds good