Doc: add a png representation of the palette overlaid with indexes (dec) #8547
Motivation / Problem
Might be useful to have an easy reference to the palette in docs.
There are numerous of these in grf projects, but I use this one which
The overlays are decimal indexes.
The overlays are decimal indexes, which makes sense with nml and friends, but for OpenTTD we might prefer hex. I could patch the generator to do that.
Not going to be offended if this PR is rejected as unnecessary.
Checklist for review
Some things are not automated, and forgotten often. This list is a reminder for the reviewers.