chore(deps): drop file-type override (incompatible with @jimp/core)

The file-type 21.x patched version is ESM-only and triggers
ERR_PACKAGE_PATH_NOT_EXPORTED when the old CJS @jimp/core does
`require('file-type')`, breaking the webpack-pwa-manifest plugin used in
webpack.ssg.mjs and failing the E2E build step. @jimp/core is the only
consumer of file-type in the tree and pins it to ^16.5.4, so no
overrideable patched version exists.

The GHSA-5v7r-6r5c-r473 advisory remains; closing it would require
upgrading webpack-pwa-manifest to a version using a maintained image
processor.

Author: claude

package-lock.json

@@ -72,7 +72,6 @@
     "eval": "^0.1.5",
     "eslint-plugin-react-hooks": "7.0.1",
     "@tootallnate/once": "^3.0.1",
-    "file-type": "^21.3.1",
     "form-data": "^4.0.4",
     "minimist": "^1.2.8",
     "nth-check": "^2.0.1",