Negative/Inverted Colors

BUR #59683 is pending approval.

create implication negative -> inverted_colors

According to the wiki, "negative" is the "inverted colors" version for monochrome posts

The wiki says "A palette-swap from monochrome color style.", but that's not how negative is commonly understood. Looking at the tag, most aren't actually monochrome swaps.

This bulk update request is pending automatic rejection in 5 days.