feat: enable TypeScript strict mode #3016

Job	Run time
Prepare CI	4s
Lint App / biomejs	18s
Tests / Run Tests	1m 33s
Tests / SonarQube Cloud Analysis	1m 15s
Build / Build Windows (electron-builder)	1m 59s
Build / Build macOS (electron-builder)	2m 40s
Build / Build Linux (electron-builder)	3m 41s
	11m 30s

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