chore: Add hex-icon

README.md

man/figures/logo.png

pkgdown/favicon/apple-touch-icon-120x120.png

pkgdown/favicon/apple-touch-icon-152x152.png

pkgdown/favicon/apple-touch-icon-180x180.png

pkgdown/favicon/apple-touch-icon-60x60.png

pkgdown/favicon/apple-touch-icon-76x76.png

pkgdown/favicon/apple-touch-icon.png

pkgdown/favicon/favicon-16x16.png

pkgdown/favicon/favicon-32x32.png

pkgdown/favicon/favicon.ico