document KnowledgeBase database type

dashjoin/dashjoin-aas#702

Author: aeberhart

dashjoin-docs/docs/support-matrix.md

@@ -33,3 +33,9 @@ RDF4J | rdf4j-runtime  | 3.7.4 | beta / must be deployed as a remote database -
 ArangoDB | arangodb-java-driver  | 6.14.0 | beta |
 
 [Click here](https://www.youtube.com/watch?v=_itCZjvw9D8) for a demo video.
+
+## Vector Databases
+
+| Database  | Driver class  | Driver version | Status |
+|---|---|---|---|
+pgvector | org.postgresql.Driver | 42.5.0 | Use via the KnowledgeBase database |

dashjoin-docs/llms/database.json

@@ -102,6 +102,16 @@
                     }
                 }
             }
-        }
+        },
+		{
+		    "title": "KnowledgeBase",
+		    "description": "Expose the RAG document knowledge base to the platform",
+		    "code": {
+		        "ID": "dj/kb",
+		        "name": "kb",
+				"djClassName": "com.dashjoin.ai.KnowledgeBase",
+				"url": "http://localhost:8001"
+		    }
+		}
     ]
 }