updated structure for better navigation in the toctree

Signed-off-by: Francisco Javier Arceo <farceo@redhat.com>

docs/source/providers/index.md

@@ -33,14 +33,20 @@ Importantly, Llama Stack always strives to provide at least one fully "local" pr
 
 ## Vector IO
 
-Vector IO refers to operations on vector databases, such as adding documents, searching, and deleting documents. 
+Vector IO refers to operations on vector databases, such as adding documents, searching, and deleting documents.
-Vector IO plays a crucial role in [Retreival Augmented Generation (RAG)](../building_applications/rag), where the vector 
+Vector IO plays a crucial role in [Retreival Augmented Generation (RAG)](../..//building_applications/rag), where the vector
 io and database are used to store and retrieve documents for retrieval.
 
+#### Vector IO Providers
 The following providers (i.e., databases) are available for Vector IO:
 
 ```{toctree}
 :maxdepth: 1
 
-vector_io/index
+vector_io/faiss
+vector_io/sqlite-vec
+vector_io/chromadb
+vector_io/pgvector
+vector_io/qdrant
+vector_io/weaviate
 ```

docs/source/providers/vector_io/chromadb.md

@@ -1,3 +1,6 @@
+---
+orphan: true
+---
 # Chroma 
 
 [Chroma](https://www.trychroma.com/) is an inline and remote vector 

docs/source/providers/vector_io/faiss.md

@@ -1,3 +1,6 @@
+---
+orphan: true
+---
 # Faiss
 
 [Faiss](https://github.com/facebookresearch/faiss) is an inline vector database provider for Llama Stack. It 

docs/source/providers/vector_io/index.md

@@ -1,10 +0,0 @@
-```{toctree}
-:maxdepth: 2
-
-chromadb
-sqlite-vec
-faiss
-pgvector
-qdrant
-weaviate
-```

docs/source/providers/vector_io/pgvector.md

@@ -1,3 +1,6 @@
+---
+orphan: true
+---
 # Postgres PGVector
 
 [PGVector](https://github.com/pgvector/pgvector) is a remote vector database provider for Llama Stack. It 

docs/source/providers/vector_io/qdrant.md

@@ -1,3 +1,6 @@
+---
+orphan: true
+---
 # Qdrant
 
 [Qdrant](https://qdrant.tech/documentation/) is a remote vector database provider for Llama Stack. It 

docs/source/providers/vector_io/sqlite-vec.md

@@ -1,3 +1,6 @@
+---
+orphan: true
+---
 # SQLite-Vec
 
 [SQLite-Vec](https://github.com/asg017/sqlite-vec) is an inline vector database provider for Llama Stack. It 

docs/source/providers/vector_io/weaviate.md

@@ -1,3 +1,6 @@
+---
+orphan: true
+---
 # Weaviate 
 
 [Weaviate](https://weaviate.io/) is a vector database provider for Llama Stack.