fix: expose useStorage with types

[pi0]

🔗 Linked issue

nuxt/nuxt#19148

❓ 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

Expose useStorage types with runtime implementation outside of vfs.

📝 Checklist

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

[codecov]

Codecov Report

Merging #1026 (5e8af85) into main (d2b34e0) will decrease coverage by 0.05%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main    #1026      +/-   ##
==========================================
- Coverage   67.64%   67.59%   -0.05%     
==========================================
  Files          62       62              
  Lines        6267     6259       -8     
  Branches      707      707              
==========================================
- Hits         4239     4231       -8     
  Misses       2015     2015              
  Partials       13       13              

Impacted Files	Coverage Δ
src/rollup/plugins/storage.ts	98.63% <100.00%> (-0.14%)	⬇️

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[danielroe]

looks perfect 👌