RAGFlow go API server (#13240)

# RAGFlow Go Implementation Plan 🚀

This repository tracks the progress of porting RAGFlow to Go. We'll
implement core features and provide performance comparisons between
Python and Go versions.

## Implementation Checklist

- [x] User Management APIs
- [x] Dataset Management Operations
- [x] Retrieval Test
- [x] Chat Management Operations
- [x] Infinity Go SDK

---------

Signed-off-by: Jin Hai <haijin.chn@gmail.com>
Co-authored-by: Yingfeng Zhang <yingfeng.zhang@gmail.com>

cmd/ragflow_cli.go

@@ -0,0 +1,34 @@
+package main
+
+import (
+	"fmt"
+	"os"
+	"os/signal"
+	"syscall"
+
+	"ragflow/internal/cli"
+)
+
+func main() {
+	// Create CLI instance
+	cliApp, err := cli.NewCLI()
+	if err != nil {
+		fmt.Printf("Failed to create CLI: %v\n", err)
+		os.Exit(1)
+	}
+
+	// Handle interrupt signal
+	sigChan := make(chan os.Signal, 1)
+	signal.Notify(sigChan, syscall.SIGINT, syscall.SIGTERM)
+	go func() {
+		<-sigChan
+		cliApp.Cleanup()
+		os.Exit(0)
+	}()
+
+	// Run CLI
+	if err := cliApp.Run(); err != nil {
+		fmt.Printf("CLI error: %v\n", err)
+		os.Exit(1)
+	}
+}