fix: images rendering below extmarks on same line

[benlubas]

fixes: #84

Currently: The virtual text is added after the image, so nvim renders the image padding first, and then the text. But we're assuming that the image should be below all of the extmarks that are on the same line. This is something that I missed in my last PR

After this PR: Image renders with it's extmark b/c we break out of a loop when we find the images own extmark

[3rd]

Ah great catch, thank you :heart:

[3rd]

Hey, I had to revert the changes here because it was stacking images, maybe we find another way.

[benlubas]

I'll take a look later tonight or tomorrow.