Add cookie-banner React example app

Interactive playground with themed banner, headless components,
and debug tabs demonstrating programmatic consent access via
getConsent() across separate bundles.

Signed-off-by: Émile Ré <emile@probo.com>

examples/cookie-banner-react/src/custom-elements.d.ts

@@ -0,0 +1,35 @@
+import "react";
+
+type CE<T = object> = React.DetailedHTMLProps<
+  React.HTMLAttributes<HTMLElement> & T,
+  HTMLElement
+>;
+
+declare module "react" {
+  namespace JSX {
+    interface IntrinsicElements {
+      "probo-cookie-banner-root": CE<{
+        "banner-id"?: string;
+        "base-url"?: string;
+        lang?: string;
+      }>;
+      "probo-banner": CE;
+      "probo-preference-panel": CE;
+      "probo-category-list": CE;
+      "probo-category-toggle": CE;
+      "probo-cookie-list": CE;
+      "probo-accept-button": CE;
+      "probo-reject-button": CE;
+      "probo-customize-button": CE;
+      "probo-save-button": CE;
+      "probo-settings-button": CE<{ position?: string }>;
+      "probo-cookie-banner": CE<{
+        "banner-id"?: string;
+        "base-url"?: string;
+        position?: string;
+        "reopen-widget"?: string;
+        lang?: string;
+      }>;
+    }
+  }
+}