Migrate to ECMAScript Modules

Migrate the usage of CommonJS specific code and imports to ESM.  Roughly
summarised this:
- Changes all require() calls to import statement or expressions.
- Changes usage of module.exports to export statements.
- Replaces require.resolve with import.meta.resolve.
- Replaces conditional imports with conditional subpath imports.
- Replaces module === require.main with import.meta.main.
- Adds the full filename with extention to all relative imports.
- Changes all usage of __dirname and __filename to their import.meta
  equivalents.
- Sets "type": "module" in package.json files.
- Removes usage of "use strict".
- Adds .ts an an alias of .js for the webpack build.

Due to differences in how require and import resolves files the plugin
entrypoints will have to include the filename and extension after this
migration in order to work.

packages/controller/controller.ts

@@ -27,12 +27,12 @@ import jwt from "jsonwebtoken";
 
 // homebrew modules
 import * as lib from "@clusterio/lib";
-const { ConsoleTransport, levels, logger } = lib;
+import { ConsoleTransport, levels, logger } from "@clusterio/lib";
 
-import Controller from "./src/Controller";
-import UserManager from "./src/UserManager";
-import UserRecord from "./src/UserRecord";
-import { version } from "./package.json";
+import Controller from "./src/Controller.js";
+import UserManager from "./src/UserManager.js";
+import UserRecord from "./src/UserRecord.js";
+import packageConfig from "./package.json" with { type: "json" };
 
 // globals
 let controller: Controller;
@@ -216,7 +216,7 @@ async function handleCopyStaticCommand(
 	pluginInfos: lib.PluginNodeEnvInfo[],
 ) {
 	await fs.cp(
-		path.join(__dirname, "..", "web", "static"),
+		path.join(import.meta.dirname, "..", "web", "static"),
 		args.target,
 		{
 			recursive: true,
@@ -377,7 +377,7 @@ async function initialize(): Promise<InitializeParameters> {
 	let command = args._[0];
 	let shouldRun = false;
 	if (command === "run") {
-		logger.info(`Starting Clusterio controller ${version}`);
+		logger.info(`Starting Clusterio controller ${packageConfig.version}`);
 		if (args.recovery) {
 			logger.warn("Controller recovery mode enabled. Some features will be disabled.");
 		}
@@ -426,7 +426,7 @@ async function initialize(): Promise<InitializeParameters> {
 		}
 	}
 
-	controllerConfig.set("controller.version", version); // Allows tracking last loaded version
+	controllerConfig.set("controller.version", packageConfig.version); // Allows tracking last loaded version
 
 	if (!controllerConfig.get("controller.auth_secret")) {
 		logger.info("Generating new controller authentication secret");
@@ -537,6 +537,6 @@ ${err.stack}`
 	});
 }
 
-if (module === require.main) {
+if (import.meta.main) {
 	bootstrap();
 }