[Feature Request] - ability to change sticker size and allow for transparent background

[bryanrossUK]

Firstly, thank you @jp-cen for all the hard work on Make.md; it's awesome and I'm looking forward to the 1.0 release!

If it was possible in the future to allow users to choose the size of stickers and have the option to make them transparent, that would be brilliant. Here's an example of the output, which I've managed to make work with a CSS Snippet.

For anyone else that would like this, here's the CSS snippet I use. I'm no designer, so there's likely a better way to achieve it.

💡 Bonus points to anyone who can tell me how to adjust the positioning of the sticker, so it's sits vertically centred to the bottom of the cover photo!

.mk-header-icon {
  --icon-size: 120px;
  --icon-container-size: 120px;
  --icon-color: transparent !important;
  --label-color: transparent !important;
}