[TASK] Create CE with IRRE relation in languages 0, -1 and 1

[ErHaWeb]

Create test content in the following structure:

Page (Default language)

• Content element (0)

  • Child (0)
  • Child (-1)
  • Child (1)

• Content element (-1)

  • Child (0)
  • Child (-1)
  • Child (1)

Page translation (1)

• Content element (1, translation of 0)
  • Child (1, translation of 0)
  • Child (1, translation of -1)
  • Child (1, translation of 1)

Test extension created for this scenario during the meeting on August 29, 2025: test.zip