Set item description as infotext for item entities

[fluxionary]

• Goal of the PR

this allows seeing what a dropped item is before you pick it up.

• How does the PR work?

it adds the item's description to the infotext in the item's properties.

• Does it resolve any reported issue?

i don't think so.

• Does this relate to a goal in the roadmap?

probably not.

• If not a bug fix, why is this PR needed? What usecases does it solve?

this is just a minor quality-of-life tweak.

How to test

launch any world, drop an item, and point your reticle at it.

[Wuzzy2]

Does this work with multi-line item descriptions? If not, use get_short_description() instead.

[srifqi]

Does this work with multi-line item descriptions?

This does work for multi-line descriptions (maximum 6 lines after text wrapping).

[fluxionary]

get_short_description

is fundamentally broken: #12566