Checklist

Required

• I wrote the PR title in conventional commit format.
• I ran the code formatter.
• I linked any relevant issues using github keyword syntax so it can be closed automatically.
• I have committed my changes to new branch that isn't main so it won't cause conflict when updating main branch later.

Optional

• I have documented the changes in the appropriate location in the doc/ folder.

Purpose of change

To continue improving the BN graphics, specifically floors with this PR.

Describe the solution

This change adds new graphics for some of the more common floor tiles

• Linoleum white, gray
• Concrete
• Waxed floor + yellow variant

This changes concrete from a multi tile sprite in favor of a single tile with a weighted array fg, and a sand bg tile.
The multi tile wasn't really adding much for looks, it was more or less the same tile with some very basic highlights.

Additional context

Also moved a few lines in the documentation, which were listed under the incorrect file.