feat: useStorage generic support

[maou-shonen]

🔗 Linked issue

❓ Type of change

• 📖 Documentation (updates to the documentation or readme)
• 🐞 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)
• ⚠️ Breaking change (fix or feature that would cause existing functionality to change)

📚 Description

related unjs/unstorage#237

📝 Checklist

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

[nuxt-studio]

✅ Live Preview ready!

Name	Edit	Preview	Latest Commit
nitro	Edit on Studio ↗︎	View Live Preview	910b768

[codecov]

Codecov Report

Merging #1279 (b431e63) into main (25b9c5c) will increase coverage by 0.02%.
The diff coverage is n/a.

❗ Current head b431e63 differs from pull request most recent head 910b768. Consider uploading reports for the commit 910b768 to get more accurate results

@@            Coverage Diff             @@
##             main    #1279      +/-   ##
==========================================
+ Coverage   76.52%   76.54%   +0.02%     
==========================================
  Files          70       70              
  Lines        7130     7121       -9     
  Branches      707      706       -1     
==========================================
- Hits         5456     5451       -5     
+ Misses       1672     1669       -3     
+ Partials        2        1       -1     

see 2 files with indirect coverage changes