[ErDiagram] Allow comments on whole entity

[Hugofbf21]

Proposal

Hello Mermaid team,
I would like to request a new feature for the ER diagram syntax in Mermaid.js. Currently, it is possible to add comments to individual attributes within an entity, but there is no syntax to comment on the entire entity itself. This feature would be very useful for providing high-level descriptions or notes about the entity as a whole.

Example

Proposed Syntax: I propose adding a new syntax to allow comments at the entity level.
For example:
erDiagram
Dog {
%% This is a comment for the entire Dog entity
uuid PK
varchar(50) name
varchar(100) owner
}

This would render a separate line with a box with the comment

Screenshots

No response