fix: normalize nitro plugin paths to url in development

[danielroe]

🔗 Linked issue

nuxt/nuxt#15249
Baroshem/nuxt-security#42

❓ 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

We need to normalize plugins that are absolute paths (C:\test\something) to file URLs on windows before we generate the imports from them in dev/index.mjs.

📝 Checklist

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

[codecov]

Codecov Report

Merging #732 (9be3f2c) into main (f08708d) will decrease coverage by 0.03%.
The diff coverage is 33.33%.

@@            Coverage Diff             @@
##             main     nuxt/framework#732      +/-   ##
==========================================
- Coverage   66.91%   66.87%   -0.04%     
==========================================
  Files          57       57              
  Lines        4232     4239       +7     
  Branches      460      460              
==========================================
+ Hits         2832     2835       +3     
- Misses       1397     1401       +4     
  Partials        3        3              

Impacted Files	Coverage Δ
src/options.ts	86.23% <33.33%> (-1.13%)	⬇️

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