Use Rspack for faster builds

rspack.config.ts

@@ -0,0 +1,29 @@
+import { defineConfig } from "@rspack/cli";
+
+export default defineConfig({
+  entry: {
+    screeps: __dirname + "/src/index.ts",
+  },
+  output: {
+    path: __dirname + "/dist",
+  },
+  target: "node10.13",
+  module: {
+    rules: [{
+      test: /\.ts$/,
+      exclude: [/node_modules/],
+      loader: "builtin:swc-loader",
+      options: {
+        jsc: {
+          parser: {
+            syntax: "typescript",
+          },
+        },
+      },
+      type: "javascript/auto",
+      resolve: {
+        extensions: [".ts", ".js"],
+      },
+    }],
+  },
+});