Add npm script for building icon versions from SVG source

`pnpm build:icons`

README.md

@@ -42,6 +42,10 @@ Make use of the many generators for code, try `pnpm ember help generate` for mor
 - `pnpm vite build --mode development` (development)
 - `pnpm build` (production)
 
+### App Icon
+
+- `pnpm build:icons` generates PNGs of all sizes from `public/icons/icon.svg`
+
 ### Deploying
 
 Specify what it takes to deploy your app.

package.json

@@ -18,6 +18,7 @@
   },
   "scripts": {
     "build": "vite build --outDir release/",
+    "build:icons": "for size in 32 48 144 180 192 512; do if [ \"$size\" -le 64 ]; then magick public/icons/icon.svg -define svg:remove-groups=map-grid -resize ${size}x${size} public/icons/icon-${size}.png; else rsvg-convert -w $size -h $size public/icons/icon.svg -o public/icons/icon-${size}.png; fi; done && rsvg-convert -w 512 -h 512 public/icons/icon.svg -o public/icons/icon-maskable.png",
     "format": "prettier . --cache --write",
     "lint": "concurrently \"pnpm:lint:*(!fix)\" --names \"lint:\" --prefixColors auto",
     "lint:css": "stylelint \"**/*.css\"",