Move JSDoc examples to type-checked .examples.ts files

Extract inline code examples from JSDoc comments into companion
`.examples.ts`/`.examples.tsx` files. Examples are now:

- Type-checked by wrapping them in functions
- Referenced via `{@includeCode ./file.examples.ts#regionName}` tags
- Organized using `//#region` and `//#endregion` markers

This keeps the main source files cleaner while ensuring examples
compile correctly. Updated TypeDoc config with `exampleTag: false`
to support title text on `@example` tags.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

src/message-transport.examples.ts

@@ -0,0 +1,58 @@
+/**
+ * Type-checked examples for {@link PostMessageTransport}.
+ *
+ * These examples are included in the API documentation via `@includeCode` tags.
+ * Each function's region markers define the code snippet that appears in the docs.
+ *
+ * @module
+ */
+
+import { PostMessageTransport } from "./message-transport.js";
+import type { App } from "./app.js";
+import type { AppBridge } from "./app-bridge.js";
+
+/**
+ * Example: Guest UI connecting to parent window.
+ */
+async function PostMessageTransport_guestUI(app: App) {
+  //#region PostMessageTransport_guestUI
+  const transport = new PostMessageTransport(window.parent, window.parent);
+  await app.connect(transport);
+  //#endregion PostMessageTransport_guestUI
+}
+
+/**
+ * Example: Host connecting to an iframe.
+ */
+async function PostMessageTransport_host(bridge: AppBridge) {
+  //#region PostMessageTransport_host
+  const iframe = document.getElementById("app-iframe") as HTMLIFrameElement;
+  const transport = new PostMessageTransport(
+    iframe.contentWindow!,
+    iframe.contentWindow!,
+  );
+  await bridge.connect(transport);
+  //#endregion PostMessageTransport_host
+}
+
+/**
+ * Example: Creating transport for guest UI (constructor only).
+ */
+function PostMessageTransport_constructor_guestUI() {
+  //#region PostMessageTransport_constructor_guestUI
+  const transport = new PostMessageTransport(window.parent, window.parent);
+  //#endregion PostMessageTransport_constructor_guestUI
+}
+
+/**
+ * Example: Creating transport for host (constructor only).
+ */
+function PostMessageTransport_constructor_host() {
+  //#region PostMessageTransport_constructor_host
+  const iframe = document.getElementById("app") as HTMLIFrameElement;
+  const transport = new PostMessageTransport(
+    iframe.contentWindow!,
+    iframe.contentWindow!,
+  );
+  //#endregion PostMessageTransport_constructor_host
+}