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.

Start by locating the existing placeholder for the question tile and trace how its text is configured and rendered. Extend the same flow to the question body, answer body, and comment body in the requested priority order, then verify that each editor displays its configured placeholder.

Written by the indexing model from the issue text.