Support for defining custom tag syntax

Example:

I want to use supported JSDoc tags with @custom-elements-manifest/analyzer:

/**
 * @prop {string} dir - The directionality of the element.
 * @prop {string} lang - The language of the element.
 */

Problem:

There is no way to define custom tags that support this format.

// tsdoc.json
{
  "$schema": "https://developer.microsoft.com/json-schemas/tsdoc/v0/tsdoc.schema.json",
  "extends": ["@microsoft/api-extractor/extends/tsdoc-base.json"],
  "tagDefinitions": [
    {
      "tagName": "@prop",
      "syntaxKind": "modifier",
      "allowMultiple": true
    }
  ],
  "supportForTags": {
    "@prop": true
  }
}

ESLint will not pass.

Proposal:

Support custom tag syntax, perhaps through regex. Further, it would be nice if you could omit specifying the syntax kind, such that the parser would allow the content following the tag to be whatever.

Start by reading the TSDoc tagDefinitions and supportForTags configuration shown in the issue, then trace how the parser handles syntaxKind and tag content. Done means a custom @prop tag can accept the demonstrated JSDoc format, including repeated tags and following content, while ESLint passes.