feat: Android Compose client for the unibus bus

Thin Jetpack Compose UI over the real Go client (pkg/client) compiled to a
gomobile .aar, so the phone speaks NATS and runs the same end-to-end crypto as
any other peer. Connect, create room (nats/matrix), publish and live-receive.

README.md

@@ -0,0 +1,18 @@
+# gallery_kt
+
+Showcase galeria de todos los componentes @fn_compose en diferentes estados
+
+Generado con `init_kotlin_app` del registry fn_registry.
+
+## Requisitos
+
+- Android SDK 34
+- JDK 17
+- Gradle 8.6 (via wrapper)
+- `kotlin/functions/ui` modulo del registry (composite build)
+
+## Build rapido
+
+```bash
+fn run gradle_assemble_debug_bash_infra apps/gallery_kt
+```