Uniformized lifecycle hooks

[GuilhermeF03]

Summary

This PR aims to uniformize lifecycle hooks across all domains(managers, app/screen, scene manager/nodes). With this, now every domain follows a predictable common lifecycle, with each domain branching as needed for specific hooks

Changes

• App now follows a onEnter -> onUpdate -> onExit
• Scene setup now is onEnter, dispose became onExit
• Managers now also have an onUpdate and an onResize lifecycle hooks
• Removed explicit manager calls from app, now it only calls Manager Registry hooks (enter, update, exit)

Related Issues

Closes #74
Closes #75