change: sidebar:state save in localStorage

[matinsoleymni]

🔗 Linked issue

no issue :)

❓ Type of change

• 📖 Documentation (updates to the documentation, readme or JSdoc annotations)
• 🐞 Bug fix (a non-breaking change that fixes an issue)
• 👌 Enhancement (improving an existing functionality like performance)
• ✨ New feature (a non-breaking change that adds functionality)
• 🧹 Chore (updates to the build process or auxiliary tools and libraries)
• ⚠️ Breaking change (fix or feature that would cause existing functionality to change)

📚 Description

In my personal project, I was using a sidebar, but since it relied on cookies, it took a bit of time to update. To improve the update speed of the sidebar’s status, I switched it to use localStorage. There was no issue opened for this, but I wanted to submit a PR to enhance performance. :)

📝 Checklist

• I have linked an issue or discussion.
• I have updated the documentation accordingly.