Added JSDoc to ESLint (#3529)

* Added JSDoc to eslint rules

Signed-off-by: Matthew Nickson <mnickson@sidingsmedia.com>

* Fixed JSDoc eslint errors

Signed-off-by: Matthew Nickson <mnickson@sidingsmedia.com>

* Update the check-linters workflow to Node.js 20

---------

Signed-off-by: Matthew Nickson <mnickson@sidingsmedia.com>
Co-authored-by: Louis Lam <louislam@users.noreply.github.com>

extra/simple-mqtt-server.js

@@ -7,11 +7,17 @@ class SimpleMqttServer {
     aedes = require("aedes")();
     server = require("net").createServer(this.aedes.handle);
 
+    /**
+     * @param {number} port Port to listen on
+     */
     constructor(port) {
         this.port = port;
     }
 
-    /** Start the MQTT server */
+    /**
+     * Start the MQTT server
+     * @returns {void}
+     */
     start() {
         this.server.listen(this.port, () => {
             console.log("server started and listening on port ", this.port);