docs: Write quetza docs

services/docs/content/en/quetza/recipes/_index.md

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+---
+title: Recipes
+weight: 3
+---
+
+
+**Quetza** recipes are strategic architectural patterns for common functional requirements. They focus on *how* to compose framework features to solve business problems.
+
+## Recipe Categories
+
+{{% cards %}}
+  {{< card link="voice-features" title="Interactive Voice Features" icon="users" subtitle="Managing audio players and guild-scoped state." >}}
+  {{< card link="conversational-ai" title="Conversational AI" icon="chip" subtitle="Handling LLM context and long-running responses." >}}
+{{% /cards %}}