Improve knip reports by using a single config with workspaces

Also move the dependency from the workspace into repo-tools.

The run with a configured workspace is slower, so I had to bump the timeout.

Signed-off-by: Axel Hecht <axel@pike.org>

package.json

@@ -126,7 +126,6 @@
     "eslint-plugin-testing-library": "^6.0.0",
     "fs-extra": "^11.2.0",
     "husky": "^9.0.0",
-    "knip": "^5.0.0",
     "lint-staged": "^15.0.0",
     "minimist": "^1.2.5",
     "node-gyp": "^10.0.0",