Place holder support At other Areas

## Is your enhancement request related to a problem? Please describe

field Place holder is a good place for educating your user in how to use product. Currently are placeholder for question tile. Request to add other placeholders in following order of priority

1. Question body (I can educate user how to write good question)
2. Answer Body (I can educate user how to write good answer)
3. comment body (least priority - I can ask user to be polite, be respectfull etc)

## Describe the solution you'd like

A clear and concise description of what you want to happen.

## Describe alternatives you've considered

A clear and concise description of any alternative solutions or features you've considered.

Comienza localizando el marcador de posición existente para la tarjeta de pregunta y sigue cómo se configura y se renderiza su texto. Extiende el mismo flujo al cuerpo de la pregunta, al cuerpo de la respuesta y al cuerpo del comentario, en el orden de prioridad solicitado, y verifica después que cada editor muestre su marcador de posición configurado.

Escrito por el modelo de indexación a partir del texto del issue.