fix: use shared Response object when running inside framework

[usernane]

Summary

When WebServicesManager is used within the WebFiori framework, it now uses App::getResponse() instead of creating its own Response instance. This ensures middleware-added headers (e.g. Set-Cookie from StartSessionMiddleware) are included in API responses.

Motivation

Middleware headers were lost because the API manager and the framework used separate Response objects. Session cookies set by start-session middleware never reached the client on API routes. Fixes #97.

Changes

• Modified WebServicesManager::__construct() to check if App::getResponse() is available and use it as the shared response object
• Falls back to new Response() for standalone usage outside the framework

How to Test / Verify

1. Create an API service with session-based auth
2. Assign start-session middleware to the route
3. Call the login endpoint
4. Verify Set-Cookie header is present in the response

Breaking Changes and Migration Steps

None. Standalone usage of the HTTP library is unaffected — it falls back to creating its own Response when the framework is not present.

Checklist

• I reviewed my own diff before requesting review
• My commits follow Conventional Commits
• The title of the pull request follows Conventional Commits
• I added/updated tests (or explained why not)
• I updated docs (if needed)
• I ran lint/cs-fixer (if applicable)
• I considered backward compatibility
• I considered security

Related issues

Closes #97

[codecov]

Codecov Report

❌ Patch coverage is 25.00000% with 6 lines in your changes missing coverage. Please review.
✅ Project coverage is 92.12%. Comparing base (baea2d5) to head (34ce8e8).
⚠️ Report is 7 commits behind head on main.

Files with missing lines	Patch %	Lines
WebFiori/Http/WebServicesManager.php	25.00%	6 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##               main      #98      +/-   ##
============================================
- Coverage     92.30%   92.12%   -0.18%     
- Complexity     1265     1268       +3     
============================================
  Files            39       39              
  Lines          3042     3049       +7     
============================================
+ Hits           2808     2809       +1     
- Misses          234      240       +6     

Flag	Coverage Δ
php-8.1	91.89% <25.00%> (-0.20%)	⬇️
php-8.2	91.96% <25.00%> (-0.18%)	⬇️
php-8.3	91.96% <25.00%> (-0.18%)	⬇️
php-8.4	91.96% <25.00%> (-0.18%)	⬇️
php-8.5	91.96% <25.00%> (-0.18%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.

[sonarqubecloud]

Quality Gate passed

Issues
26 New issues
0 Accepted issues

Measures
12 Security Hotspots
0.0% Coverage on New Code
0.5% Duplication on New Code

See analysis details on SonarQube Cloud