Improve check error performance by off-loading to worker thread w/ incremental compilation (#575)

vite.worker.config.mts

@@ -0,0 +1,29 @@
+import { defineConfig } from "vite";
+import path from "path";
+
+// https://vitejs.dev/config
+export default defineConfig({
+  resolve: {
+    alias: {
+      "@": path.resolve(__dirname, "./src"),
+    },
+  },
+  build: {
+    sourcemap: true,
+    // target: "node16",
+    lib: {
+      entry: path.resolve(__dirname, "workers/tsc/tsc_worker.ts"),
+      name: "tsc_worker",
+      fileName: "tsc_worker",
+      formats: ["cjs"],
+    },
+    rollupOptions: {
+      external: ["node:fs", "node:path", "node:worker_threads", "typescript"],
+      //   output: {
+      //     dir: "dist/workers/tsc",
+      //   },
+    },
+    // outDir: "dist/workers/tsc",
+    // emptyOutDir: true,
+  },
+});