Feat: es modules (#139)

* All file imports change from commonjs to es-module

* Improved plex error responses back from api

* Converted viewHistory to es module

* Es-module requires file extension, updated all imports

* Fix esmodule not having __dirname defined in scope

* Replace dynamic-require with fs readFileSync

* Short message service module function is exported as default

* Resolved lint issues & ignore import/extension rule until typescript

* All tests file imports changed from commonjs to es-module

* Import json fixtures with new helper

src/webserver/controllers/plex/search.js

@@ -1,5 +1,7 @@
-const configuration = require("../../../config/configuration").getInstance();
-const Plex = require("../../../plex/plex");
+import Plex from "../../../plex/plex.js";
+import Configuration from "../../../config/configuration.js";
+
+const configuration = Configuration.getInstance();
 
 const plex = new Plex(configuration.get("plex", "ip"));
 
@@ -28,4 +30,4 @@ function searchPlexController(req, res) {
     });
 }
 
-module.exports = searchPlexController;
+export default searchPlexController;