refactor(TeacherProjectService): Extract RemoveNodeIdFromTransitionsService

[hirokiterashima]

Changes

• Extract code related to removing node from transitions (when deleting and moving steps in the AT) to a new class, RemoveNodeIdFromTransitionsService
• Add private modifiers and return types to the functions that were moved over to the new class
  • Note: I kept removeTransitionsOutOfGroup() public because we had a test for it, and I just moved the test to RemoveNodeIdFromTransitionsService spec file. In the future, we should make this function private and add tests for the remove() function.

Test

• In the AT > unit view, try moving and deleting step(s) and lesson(s). They should work as before
  • the UI should update and correctly display the new state after move/deletion
  • the node transition(s) should update correctly

[hirokiterashima]

:tada: This issue has been resolved in version 5.156.2 :tada:

The release is available on GitHub release

Your semantic-release bot :package::rocket: