Feat: Importing data flow files from the list page #9869 (#10446)

### What problem does this PR solve?

Feat: Importing data flow files from the list page #9869

### Type of change


- [x] New Feature (non-breaking change which adds functionality)

web/src/constants/agent.ts

@@ -52,3 +52,13 @@ export enum AgentCategory {
   AgentCanvas = 'agent_canvas',
   DataflowCanvas = 'dataflow_canvas',
 }
+
+export enum DataflowOperator {
+  Begin = 'File',
+  Note = 'Note',
+  Parser = 'Parser',
+  Tokenizer = 'Tokenizer',
+  Splitter = 'Splitter',
+  HierarchicalMerger = 'HierarchicalMerger',
+  Extractor = 'Extractor',
+}