Move non-Node script from package.json to workflow (#485) [skip ci]

* Move non-Node script from `package.json` to workflow

Module `dprint` is not used in a Node context so should not be placed in `package.json`.

* Unformat

package.json

@@ -10,9 +10,9 @@
     "quickstart": "node .github/quickstart/index.mjs",
     "preview": "node .github/preview.mjs",
     "linter": "eslint source/**/*.mjs --quiet",
+    "format": "eslint source/**/*.mjs --fix",
     "dev": "nodemon source/app/web/index.mjs -e mjs,css,ejs,json",
     "postinstall": "node node_modules/puppeteer/install.js",
-    "fmt": "dprint fmt --config .github/config/dprint.json && npx eslint source/**/*.mjs --fix",
     "indepth": "node source/plugins/languages/analyzers.mjs"
   },
   "repository": {