fix(config): resolve device pixel ratio through env

[asturur]

Resolve device pixel ratio through the environment boundary instead of reading browser globals from core configuration defaults.

• Leave config.devicePixelRatio unset by default so it acts as an explicit override.
• Resolve DPR at usage time with the compact config/env-window/1 fallback expression.
• Cover configured, browser-env, and fallback DPR behavior in env tests.
• Ignore generated top-level e2e report output for git and prettier checks.

related to #10894

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[github-actions]

Build Stats

file / KB (diff)	bundled	minified
fabric	774.151 (+0.001)	293.655 (-0.021)

[github-actions]

=============================== Coverage summary ===============================
Statements   : 79.81% ( 8035/10067 )
Branches     : 76.74% ( 4323/5633 )
Functions    : 85.48% ( 1525/1784 )
Lines        : 79.8% ( 7855/9843 )
================================================================================

[asturur]

ok next PR should be the large one. Where i move all src files

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
100.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[Smrtnyk]

are you ignoring the whole e2e package?

[asturur]

the package has moved in packages/e2e but i still had the folder full of test-report and test-results, as soon as .gitignore was modified my git wanted to track those files again and again, so i cut it out. everything is in packages/e2e in theory