feat: add LanceDB vector database provider

- Implemented LanceDBProvider for managing vector collections, including methods for creating, deleting, and searching collections.
- Added support for LanceDB configuration in VectorDBConfig.
- Introduced stub for LanceDB provider when not built with the appropriate tag.
- Updated provider initialization to include LanceDB as a supported type.
- Created types and interfaces for vector operations, including Vector, SearchRequest, and SearchResult.
- Added tests for VectorDBConfig unmarshalling and for ensuring proper error handling when LanceDB is not built.
- Updated enums to include LanceDB type and labels.
- Modified frontend enums to reflect the addition of LanceDB.

internal/pkg/enums/knowledge.go

@@ -3,11 +3,13 @@ package enums
 type VectorDBType string
 
 const (
-	VectorDBTypeQdrant VectorDBType = "qdrant"
+	VectorDBTypeQdrant  VectorDBType = "qdrant"
+	VectorDBTypeLanceDB VectorDBType = "lancedb"
 )
 
 var vectorDBTypeLabelMap = map[VectorDBType]string{
-	VectorDBTypeQdrant: "Qdrant",
+	VectorDBTypeQdrant:  "Qdrant",
+	VectorDBTypeLanceDB: "LanceDB",
 }
 
 func GetVectorDBTypeLabel(dbType VectorDBType) string {