build(deps-dev): Bump knip from 5.88.1 to 6.3.0

Bumps [knip](https://github.com/webpro-nl/knip/tree/HEAD/packages/knip) from 5.88.1 to 6.3.0.
- [Release notes](https://github.com/webpro-nl/knip/releases)
- [Commits](https://github.com/webpro-nl/knip/commits/knip@6.3.0/packages/knip)

---
updated-dependencies:
- dependency-name: knip
  dependency-version: 6.3.0
  dependency-type: direct:development
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

frontends/postgres/package.json

@@ -134,7 +134,7 @@
     "eslint-plugin-tailwindcss": "^4.0.0-beta.0",
     "get-db": "^0.13.0",
     "jest": "^30.2.0",
-    "knip": "^5.84.1",
+    "knip": "^6.3.0",
     "lefthook": "^2.1.1",
     "npm-run-all2": "^8.0.4",
     "postcss": "^8.5.6",