Feat: Initialize context engine CLI (#13776)

### What problem does this PR solve?

- Add multiple output format to ragflow_cli
- Initialize contextengine to Go module
  - ls datasets/ls files
  - cat file
  - search -d dir -q query

issue: #13714

### Type of change

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

internal/cli/user_command.go

@@ -143,13 +143,19 @@ func (c *RAGFlowClient) ListUserDatasets(cmd *Command) (ResponseIf, error) {
 		iterations = val
 	}
 
+	// Determine auth kind based on whether API token is being used
+	authKind := "web"
+	if c.HTTPClient.useAPIToken {
+		authKind = "api"
+	}
+
 	if iterations > 1 {
 		// Benchmark mode - return raw result for benchmark stats
-		return c.HTTPClient.RequestWithIterations("GET", "/datasets", true, "web", nil, nil, iterations)
+		return c.HTTPClient.RequestWithIterations("GET", "/datasets", true, authKind, nil, nil, iterations)
 	}
 
 	// Normal mode
-	resp, err := c.HTTPClient.Request("GET", "/datasets", true, "web", nil, nil)
+	resp, err := c.HTTPClient.Request("GET", "/datasets", true, authKind, nil, nil)
 	if err != nil {
 		return nil, fmt.Errorf("failed to list datasets: %w", err)
 	}