Agriculture tower could use more detailed per-cell information

[h.q.droid]

When placing an agriculture tower, each cell could display more information, like "natural soil" "cannot plant over rock" or "need artificial*1 + overgrowth*4". The words could be replaced with icons.

The current red-yellow-green highlight is uninformative and can be confusing to new players since it's very frequently all-yellow or all-red, and yellow tiles needing overgrowth are effectively red when just starting. On top of it, when placing a tower, both power and roboport coverage are also highlighted, the roboport one uses a confusingly similar color theme to the soil type colors.