Finalize Healing Father cutscene and refactor observer pointer casting

  • Implement healing phase for crystals, where elemental elements move toward Roran, shrink, and are absorbed.
  • Implement Roran’s healing behavior, stopping skin flickering and transitioning to a healed idle animation.
  • Add skip button for Cutscene 5.
  • Add and register voice-over audio for Roran and Alar/Alara.
  • Simplify and refactor callback timer code across multiple files by capturing this directly and using observer_from_this() without casting.
  • Inline one-off helper functions applyDmgToPlayer, checkSurroundingsTick, wakeUp, and typeOneChar.
  • Remove debug prints for GroundState, velocity, and ambient colors.
  • Update cutscene script and todo documentation.

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