fix(playground): move "animating" text below codeblock

[McPizza0]

fix #4

[antfu]

I guess maybe instead of removing the element, we could toggle the opacity to zero, so it doesn't cause the layout shift. The reason I don't want to put it below is that the container might resize and cause the indicator moves

[McPizza0]

toggle the opacity to zero

thats fair and a good approach
it would leave an misalignment between the input and shiki though

another alternative is to place it inline with the button

[antfu]

I am up for that. We will find a better way to indicate that later.

[McPizza0]

updated