Plugin directory search highlighting

[tellyworth]

Search results should highlight matching keywords, and generally give a better indication as to why results have been included.

That's easy enough for matches on the title and short description. Some thought needs to be given for matches on fields that aren't normally displayed on the results page.

[gibrown]

We should keep this open, it was specifically requested for the "the result pages to show what matched, instead of a generic plugin card"