feat: Remove defer from script tag

[zatteo]

defer was added during rsbuild migration without being directly related to rsbuild migration and:

• it has no interest because we load an empty HTML with scripts and we are dependent to these scripts so we must wait them
• we suspect highly that defer has strange behavior on Safari causing scripts to be executed before CSS loaded leading to MUI errors

[bundlemon]

BundleMon

Unchanged files (10)

Status	Path	Size	Limits
✅	static/js/cozy.(hash).js	553.32KB	-
✅	static/js/(chunkId).(hash).js	528.25KB	-
✅	static/js/main.(hash).js	263.94KB	-
✅	services/autoDefineLabels.js	243.6KB	-
✅	services/keepIndexFullNameAndDisplayNameUpToD ate.js	243.4KB	-
✅	services/cleanRelatedContacts.js	243KB	-
✅	static/js/lib-react.(hash).js	44.11KB	-
✅	static/css/cozy.(hash).css	29.44KB	-
✅	static/js/lib-router.(hash).js	21.86KB	-
✅	static/css/main.(hash).css	1.11KB	-

No change in files bundle size

Unchanged groups (3)

Status	Path	Size	Limits
✅	**/*.js	3.5MB	-
✅	**/*.{png,svg,ico}	1.15MB	-
✅	**/*.css	59.47KB	-

Final result: ✅

View report in BundleMon website ➡️

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Current branch size history | Target branch size history