refactor(code-runtime): name the Node runtime provider

packages/code-runtime/code-runtime-node/tsdown.config.ts

@@ -0,0 +1,29 @@
+import { defineConfig } from 'tsdown'
+
+/**
+ * Build the index and worker as separate single-entry bundles. The sibling `worker.cjs` is loaded
+ * by file and must be CommonJS for pkg's VFS Worker hook. A multi-entry build emits an unlisted
+ * shared chunk omitted by the package's exact `files` whitelist; separate builds inline it.
+ */
+export default defineConfig([
+  {
+    entry: ['lib/types/index.js'],
+    outDir: 'lib',
+    format: ['esm'],
+    platform: 'node',
+    target: 'es2024',
+    fixedExtension: false,
+    dts: false,
+    clean: false,
+  },
+  {
+    entry: ['lib/types/worker.js'],
+    outDir: 'lib',
+    format: ['cjs'],
+    platform: 'node',
+    target: 'es2024',
+    fixedExtension: false,
+    dts: false,
+    clean: false,
+  },
+])