Make @example a known doc tag

[timotheeguerin]

Proposal

Add @example as a known tag with the following format

First line is the title (optional - if line is empty then there is no title)
Rest is the tag content

/**
 *  @example First line is example title
 * rest is 
 * example
 * content
 *
 */

woudl result in the following

{
  title: "First line is example title",
  content: "rest is\nexample\ncontent",
}

[markcowl]

est: 5