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)
• 👌 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.

[danielroe]

why do we not want to hint to prerender static images if called from a server endpoint?

maybe instead we use getEvent and prerender them if it's available?

[Afshar07]

Thanks for the hint, i have tried the generate command and i see that beside this, i have a lot of unhandled situations!
But my main problem is i do not have access to image-options virtual file in nitro when generating, i need to handle that.
I investigate the source code more precisely, review my code and come back with a solution ASAP.
Is there anything specific i need to know? like about writing tests or anything else?
Thanks for your time.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 50.00000% with 15 lines in your changes missing coverage. Please review.

Project coverage is 63.22%. Comparing base (f087d01) to head (b5a9ebf).
Report is 3 commits behind head on main.

Files with missing lines	Patch %	Lines
src/runtime/server/utils/image.ts	0.00%	12 Missing and 1 partial ⚠️
src/module.ts	86.66%	1 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1473      +/-   ##
==========================================
- Coverage   63.37%   63.22%   -0.16%     
==========================================
  Files          79       80       +1     
  Lines        3607     3630      +23     
  Branches      407      411       +4     
==========================================
+ Hits         2286     2295       +9     
- Misses       1292     1304      +12     
- Partials       29       31       +2     

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