Add parsers object to RuleParams type, annotate every rule definition with Rule type for better type validation.

lib/md014.js

@@ -6,6 +6,8 @@ const { addErrorContext, filterTokens } = require("../helpers");
 
 const dollarCommandRe = /^(\s*)(\$\s+)/;
 
+// eslint-disable-next-line jsdoc/valid-types
+/** @type import("./markdownlint").Rule */
 module.exports = {
   "names": [ "MD014", "commands-show-output" ],
   "description": "Dollar signs used before commands without showing output",
@@ -35,6 +37,7 @@ module.exports = {
             const [ i, lineTrim, column, length ] = instance;
             addErrorContext(
               onError,
+              // @ts-ignore
               i + 1,
               lineTrim,
               null,