Bump tailwindcss from 3.4.17 to 4.1.16

Bumps [tailwindcss](https://github.com/tailwindlabs/tailwindcss/tree/HEAD/packages/tailwindcss) from 3.4.17 to 4.1.16.
- [Release notes](https://github.com/tailwindlabs/tailwindcss/releases)
- [Changelog](https://github.com/tailwindlabs/tailwindcss/blob/main/CHANGELOG.md)
- [Commits](https://github.com/tailwindlabs/tailwindcss/commits/v4.1.16/packages/tailwindcss)

---
updated-dependencies:
- dependency-name: tailwindcss
  dependency-version: 4.1.16
  dependency-type: direct:development
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

package.json

@@ -15,7 +15,7 @@
     "lint:css": "echo 'CSS linting via Tailwind CSS - check for build errors'"
   },
   "devDependencies": {
-    "tailwindcss": "^3",
+    "tailwindcss": "^4",
     "eslint": "^8.57.0",
     "eslint-config-standard": "^17.1.0",
     "eslint-plugin-import": "^2.29.1",