📌 Bump packery from 2.1.2 to 3.0.0

Bumps [packery](https://github.com/metafizzy/packery) from 2.1.2 to 3.0.0.
- [Release notes](https://github.com/metafizzy/packery/releases)
- [Commits](https://github.com/metafizzy/packery/compare/v2.1.2...v3.0.0)

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

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

package.json

@@ -41,7 +41,7 @@
     "katex": "^0.16.21",
     "lite-youtube-embed": "^0.3.3",
     "mermaid": "^11.5.0",
-    "packery": "^2.1.2",
+    "packery": "^3.0.0",
     "prettier": "^3.5.3",
     "prettier-plugin-go-template": "^0.0.15",
     "prettier-plugin-tailwindcss": "^0.6.11",