feat: Introduce logo (modified version of Tweed 4 logo)

images/export-logo.sh

@@ -0,0 +1,12 @@
+#!/usr/bin/env sh
+
+export_png() {
+  file="logo-$1.png"
+  file_min="logo-$1.min.png"
+  inkscape --export-area-drawing --export-width="$1" --export-height="$1" --export-filename="$file" logo.svg
+  pngquant --quality 20-80 "$file" -o "$file_min" -f --skip-if-larger
+  mv "$file_min" "$file"
+}
+
+export_png 48
+export_png 128