Highlight invalid params in doc comments

[benlesh]

Working on Angular, the team has mostly been very, very on-it with updating doc comments in great detail. However, it's been said by WebStorm users on our team that they catch a lot of invalid params docs, and or missing params docs because WebStorm has a feature that hightlights those issues, and VS Code users haven't had that feature so we miss things sometimes. (Sorry to make a comparison, this is just where the idea came up)

Example

/**
 * This method takes arguments and does basically nothing with them. :)
 * @param b The string that we do nothing with
 * @param c A dearly departed argument that should no longer be documented.
 */
function foo(a: number, b: string) {
}

Ideally in the above example, VS Code would catch two problems:

1. a is missing a param entry in the doc comment
2. c is no longer an argument and should be highlighted for removal.

[mjbvz]

Duplicate of #11378 I believe

[typescript-bot]

This issue has been marked as a 'Duplicate' and has seen no recent activity. It has been automatically closed for house-keeping purposes.