feat(providers): add cloudflareimages provider

[huang-julien]

🔗 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

This PR adds Cloudflare Image provider, its a bit different from the main Cloudflare provider which is the cloudflare transformation service.

This adds a variant modifier but still allows CLoudflare transformation url params (users needs to enable flexible variant)

[pkg-pr-new]

Open in StackBlitz

npm i https://pkg.pr.new/@nuxt/image@2100

commit: e058ead

[cloudflare-workers-and-pages]

Deploying nuxt-image with    Cloudflare Pages

Latest commit:	e058ead
Status:	✅  Deploy successful!
Preview URL:	https://1957552f.nuxt-image.pages.dev
Branch Preview URL:	https://feat-cloudflareimages.nuxt-image.pages.dev

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📝 Walkthrough

Walkthrough

Adds Cloudflare Images as a built-in provider. Updates BuiltInProviders in src/provider.ts to include cloudflareimages, and adds a new provider module src/runtime/providers/cloudflareimages.ts exporting CloudflareImagesModifiers, CloudflareImagesOptions, and a default provider implementing getImage that builds Cloudflare Images URLs (default baseURL https://imagedelivery.net/ and default variant public), using an operations string when modifiers are present. Adds related tests, a snapshot, and test data updates for the new provider.

Estimated code review effort

🎯 3 (Moderate) | ⏱️ ~20 minutes

🚥 Pre-merge checks | ✅ 3

✅ Passed checks (3 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly and concisely describes the main change: adding a new Cloudflare Images provider.
Description check	✅ Passed	The description is directly related to the changeset, explaining what Cloudflare Images provider is, how it differs from the existing Cloudflare provider, and its key features.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

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✨ Finishing touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch feat/cloudflareimages

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[codecov-commenter]

Codecov Report

❌ Patch coverage is 1.75439% with 56 lines in your changes missing coverage. Please review.
✅ Project coverage is 6.91%. Comparing base (ac802b3) to head (e058ead).

Files with missing lines	Patch %	Lines
src/runtime/providers/cloudflareimages.ts	1.78%	55 Missing ⚠️
src/provider.ts	0.00%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff            @@
##            main   #2100      +/-   ##
========================================
- Coverage   6.99%   6.91%   -0.09%     
========================================
  Files         78      79       +1     
  Lines       3632    3689      +57     
  Branches     140     141       +1     
========================================
+ Hits         254     255       +1     
- Misses      3329    3385      +56     
  Partials      49      49              

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