refactor(main): organize main structure #2774

Job	Run time
Prepare CI	2s
Lint App / biomejs	16s
Tests / Run Tests	2m 46s
Tests / SonarQube Cloud Analysis	1m 9s
Build / Build macOS (electron-builder)	2m 28s
Build / Build Windows (electron-builder)	1m 43s
Build / Build Linux (electron-builder)	3m 19s
	11m 43s

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