feat: add animation iteration count and animation direction classes

[SantiMit1]

Descripción

Se agregaron las siguientes clases de utilidad con sus respectivos valores

• animate-iteration-count

  • animate-iteration-count-none
  • animate-iteration-count-once
  • animate-iteration-count-twice
  • animate-iteration-count-thrice
  • animate-iteration-count-infinite
  • animate-iteration-count-[number]

• animate-direction

  • animate-direction-normal
  • animate-direction-reverse
  • animate-direction-alternate
  • animate-direction-alternate-reverse

Ademas, se actualizó la todo list del readme