refactor structure

docs/source/getting_started/distributions/index.md

@@ -0,0 +1,9 @@
+# Llama Stack Distribution
+
+A Distribution is where APIs and Providers are assembled together to provide a consistent whole to the end application developer. You can mix-and-match providers -- some could be backed by local code and some could be remote. As a hobbyist, you can serve a small model locally, but can choose a cloud provider for a large model. Regardless, the higher level APIs your app needs to work with don't need to change at all. You can even imagine moving across the server / mobile-device boundary as well always using the same uniform set of APIs for developing Generative AI applications.
+
+```{toctree}
+:maxdepth: 2
+
+meta-reference-gpu
+```