feat: scaffold Go-based hf CLI

cmd/hf/main.go

@@ -0,0 +1,24 @@
+package main
+
+import (
+	"fmt"
+	"os"
+)
+
+func main() {
+	if len(os.Args) > 1 {
+		switch os.Args[1] {
+		case "--help", "-h":
+			fmt.Println("hf - HarborForge CLI")
+			fmt.Println()
+			fmt.Println("This is the initial Go scaffold for the HarborForge CLI.")
+			fmt.Println("More command groups will be added in follow-up tasks.")
+			return
+		case "version":
+			fmt.Println("hf dev")
+			return
+		}
+	}
+
+	fmt.Println("hf - HarborForge CLI scaffold")
+}