test: add size snapshot

[danielroe]

🔗 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)
• ✨ 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

[pkg-pr-new]

Open in StackBlitz

npm i https://pkg.pr.new/@nuxt/image@1815

commit: eee9f5e

[cloudflare-workers-and-pages]

Deploying nuxt-image with    Cloudflare Pages

Latest commit:	eee9f5e
Status:	✅  Deploy successful!
Preview URL:	https://66d118e2.nuxt-image.pages.dev
Branch Preview URL:	https://test-image-snapshot.nuxt-image.pages.dev

View logs

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 63.03%. Comparing base (3d79060) to head (eee9f5e).
⚠️ Report is 284 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1815   +/-   ##
=======================================
  Coverage   63.03%   63.03%           
=======================================
  Files          77       77           
  Lines        3793     3793           
  Branches      432      433    +1     
=======================================
  Hits         2391     2391           
  Misses       1376     1376           
  Partials       26       26           

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