New presenter to split sub-presenters

[hernanmd]

This PR adds a new composite presenter that contains two presenters. The first presenter is fixed and can be expanded or split. The second presenter is dynamic and can be shown split or hidden. It includes tests for opening with hidden or split view.

Demo

https://github.com/user-attachments/assets/1d342ee2-b50c-4cbb-b261-7243586c644d

[Ducasse]

Hi hernan May be you want to add a splitter and expose an API so that we can preconfigure the proportion and by default keep the equal part for each of the presenter. Like that we can get it used in many scenario. S.

[Ducasse]

these tests are failing on the server

SpToggleSplitPresenterTest
 ✗ #testOpenPresenterIsBuilt (27ms)
 ✗ #testOpenPresenterRaisesDisplayEvent (16ms)
 ✗ #testOpenPresenterRaisesBuiltEvent (30ms)
 ✗ #testExample (41ms)
 ✗ #testOpen (19ms)
 ✗ #testOpenPresenterIsDisplayed (20ms)

ZnClientTest
 ✗ #testGetGeoIP (10141ms)

SystemDependenciesTest
 ✗ #testExternalBasicToolsDependencies (19ms)
 ✗ #testExternalUIDependencies (14ms)

[hernanmd]

Hi hernan May be you want to add a splitter and expose an API so that we can preconfigure the proportion and by default keep the equal part for each of the presenter. Like that we can get it used in many scenario. S.

Thanks for the suggestion, I added a positionOfSlider: method so users can configure the proportion