Clean up npm dependencies (#35484)

- `type-fest` is replaced by our own types
- `@stylistic/eslint-plugin-js` is no longer in use, it was replaced
with `@stylistic/eslint-plugin`
- `@types/license-checker-webpack-plugin` does not apply to our forked
version and has a type stub

package.json

@@ -75,7 +75,6 @@
     "@types/dropzone": "5.7.9",
     "@types/jquery": "3.5.33",
     "@types/katex": "0.16.7",
-    "@types/license-checker-webpack-plugin": "0.2.5",
     "@types/pdfobject": "2.2.5",
     "@types/sortablejs": "1.15.8",
     "@types/swagger-ui-dist": "3.30.6",
@@ -111,7 +110,6 @@
     "stylelint-declaration-strict-value": "1.10.11",
     "stylelint-value-no-unknown-custom-properties": "6.0.1",
     "svgo": "4.0.0",
-    "type-fest": "4.41.0",
     "typescript-eslint": "8.43.0",
     "updates": "16.7.0",
     "vite-string-plugin": "1.4.6",