Currently the tracking for clicked links are injected into the HTML in a span tag. This leads to the link counter value being highlighted when copying and pasting. Additionally, any means for using CSS to hide link counters result in a gap due to it occupying a specific width.
With this change, we make link counters appear in a data attribute on the link element and visually shown with CSS `::after` element.
Replaces the existing topic map with the experimental-topic-map made by @awesomerobot.
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Co-authored-by: awesomerobot <kris.aubuchon@discourse.org>