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/config/config.go

@@ -123,14 +123,22 @@ type OSSStorageConfig struct {
 }
 
 type VectorDBConfig struct {
-	Type     string `yaml:"type"`
+	Type    string                `yaml:"type"`
+	Qdrant  QdrantVectorDBConfig  `yaml:"qdrant"`
+	LanceDB LanceDBVectorDBConfig `yaml:"lancedb"`
+}
+
+type QdrantVectorDBConfig struct {
 	Host     string `yaml:"host"`
-	Port     int    `yaml:"port"`
-	APIKey   string `yaml:"apiKey"`
 	GrpcPort int    `yaml:"grpcPort"`
+	APIKey   string `yaml:"apiKey"`
 	UseTLS   bool   `yaml:"useTls"`
 }
 
+type LanceDBVectorDBConfig struct {
+	Path string `yaml:"path"`
+}
+
 type MCPConfig struct {
 	Enabled bool                       `yaml:"enabled"`
 	Servers map[string]MCPServerConfig `yaml:"servers"`