feat: add TypeRT remote gateway infrastructure

tsdown.typert-host.config.ts

@@ -0,0 +1,20 @@
+import { defineConfig } from 'tsdown'
+import { typertPlugin } from './packages/typert/generator/lib/types/tsdown-plugin.js'
+
+/**
+ * Host-only TypeRT contract prepass. The generator and its project references
+ * are compiled first; the plugin then analyzes Host source and emits local and
+ * Host-for-Client artifacts before either aggregate consumes Remote subpaths.
+ */
+export default defineConfig({
+  workspace: ['packages/typert/generator'],
+  entry: ['lib/types/{index,invariant}.js'],
+  outDir: 'lib',
+  format: ['esm'],
+  platform: 'node',
+  target: 'es2024',
+  fixedExtension: false,
+  dts: false,
+  clean: false,
+  plugins: [typertPlugin({ mode: 'workspace', faces: ['host'] })],
+})