feat: add support for image helpers in nitro endpoints

[Afshar07]

Implement image helper utilities usage in nitro endpoints, by adding image options and nitro compatible utils in server directory. But to be honest, it's my first contribution and i might (probably am) mess with a wrong config, so, it will be so kind for anyone to point out if i have done anything wrong!

🔗 Linked issue

resolves #1447

❓ Type of change

• [ ] 📖 Documentation (updates to the documentation or readme)
• [ ] 🐞 Bug fix (a non-breaking change that fixes an issue)
• [x] 👌 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

Add an utility on server folder and auto import it into nitro, and also write image options into a virtual path in nitro. Set a boolean to check if the utility is used in nitro environment, if it is, ignore prerendering static images.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 53.48837% with 20 lines in your changes missing coverage. Please review.

Project coverage is 62.93%. Comparing base (a12c220) to head (2b938b4). Report is 67 commits behind head on main.

Files with missing lines	Patch %	Lines
src/runtime/server/utils/image.ts	7.14%	13 Missing :warning:
src/module.ts	90.00%	1 Missing and 1 partial :warning:
src/runtime/utils/prerender.ts	33.33%	2 Missing :warning:
src/runtime/components/NuxtImg.vue	0.00%	1 Missing :warning:
src/runtime/components/NuxtPicture.vue	0.00%	1 Missing :warning:
src/runtime/image.ts	50.00%	1 Missing :warning:

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1473      +/-   ##
==========================================
- Coverage   63.01%   62.93%   -0.08%     
==========================================
  Files          80       81       +1     
  Lines        3742     3772      +30     
  Branches      426      429       +3     
==========================================
+ Hits         2358     2374      +16     
- Misses       1356     1369      +13     
- Partials       28       29       +1     

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commit: 2b938b4