perf: initialise providers in parallel with nuxt setup

[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

this addresses a performance issue in which all font providers initialise in modules:done, blocking the vite build.

instead, we initiate the font provider setup at the same point, in a non-blocking manner, and wait only when it's required

[pkg-pr-new]

Open in StackBlitz

npm i https://pkg.pr.new/@nuxt/fonts@688

commit: d1421b5

[cloudflare-workers-and-pages]

Deploying fonts with    Cloudflare Pages

Latest commit:	d1421b5
Status:	✅  Deploy successful!
Preview URL:	https://b00d5cc7.fonts-dsw.pages.dev
Branch Preview URL:	https://perf-non-blocking.fonts-dsw.pages.dev

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[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 77.31%. Comparing base (e01dc68) to head (d1421b5).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #688      +/-   ##
==========================================
+ Coverage   76.90%   77.31%   +0.40%     
==========================================
  Files          11       11              
  Lines         576      573       -3     
  Branches      125      127       +2     
==========================================
  Hits          443      443              
+ Misses        127      124       -3     
  Partials        6        6              

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