refactor(main): organize main structure #2773

Job	Run time
Prepare CI	2s
Lint App / biomejs	17s
Tests / Run Tests	2m 40s
Tests / SonarQube Cloud Analysis	1m 8s
Build / Build macOS (electron-builder)	2m 19s
Build / Build Windows (electron-builder)	2m 24s
Build / Build Linux (electron-builder)	3m 26s
	12m 16s

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