Add subtitle in Poster Card

[yceballost]

Discussed in https://github.com/Telefonica/mistica-design/discussions/1540

^{Originally posted by **LucasAlbuquerque0** October 30, 2023} ### Goal Request the evolution of the Postar Card to meet a need. - Add Subtitle field - Add the Icon Button to the Top Actions (right of the Card) -> _Vamos a tratar este punto como una tarea independiente: #1650_ _Would you like to confirm if the Icon Button has a Loading status?_ ### Context Within the Smart Journey flow, there was a need for a Card that has two different interactions, one when directly clicking on it (Information Expansion) and another for a quick action that will be on and off (switch). ### Impact It will allow the user to activate and control connected smart devices in their home. ### Discussion Questions It is important that this Action Button has loading as one of the states. Guaranteeing time for functionality to access the data necessary for action. Can you confirm this information? And the possibility of this implementation, if necessary? ### Additional considerations _No response_ ### Do you have a visual proposal? https://www.figma.com/file/6Sp4S0krZaG1daAFaNh54k/Evolu%C3%A7%C3%A3o-do-Poster-Card?type=design&node-id=407-7914&mode=design&t=abdKEn1MID7QbbYw-4

• [x] Update specs
• [x] Design documentation
• [x] Add to mobile library
• [x] Add to desktop library
• [x] Web ticket