cuelang.org: allow an author to predefine the text in a search box

[jpluscplusm]

What page were you looking at?

https://cuelang.org/

What version of the site were you looking at?

cue-lang/cuelang.org@f1eb334

What did you do?

What did you expect?

I wanted to use the search shortcode to specify a predefined search term.

What did you see instead?

I could only specify predefined search tags and content types.

[JorindeUsMedia]

For developer: Check if adding it the search term as value of the search input is enough to accomplish this. If not: some js logic is needed: flters/search can be set from the url or predefined tags or contenttypes so I'm not sure if we also have to add something to the js logic for this.
Estimate: 1 - 2 hours.