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

tests/system/asAUserIWantAForbiddenErrorIfTheTokenIsMalformed.js

@@ -1,9 +1,9 @@
-const assert = require("assert");
-const chai = require("chai");
-const chaiHttp = require("chai-http");
+import assert from "assert";
+import chai from "chai";
+import chaiHttp from "chai-http";
 
-const server = require("../../src/webserver/server");
-const resetDatabase = require("../helpers/resetDatabase");
+import server from "../../src/webserver/server.js";
+import resetDatabase from "../helpers/resetDatabase.js";
 
 chai.use(chaiHttp);