Docs’ Overview pages have poor affordance

[tigt]

There’s a probably poorly-considered global CSS rule that nukes underlines from all hyperlinks unless explicitly put back in, which results in these overview pages looking not very helpful.

As seen on https://markojs.com/docs/bundler-integrations-overview/

[Deepu178]

Hii!, I want to work on this issue.
Please assign this issue to me.