Refactor core configuration and UUID handling

- Changed UUIDLength type from byte to int in core/config/consts.go
- Introduced MetaDir constant in core/config/consts.go
- Added corestate package with initial state management and UUID handling
- Implemented GetNodeUUID and SetNodeUUID functions for UUID file management
- Created RunManager and RunFileManager for runtime directory management
- Updated GeneralServer to use new configuration structure
- Removed deprecated init package and replaced with main entry point
- Added color utility functions for logging
- Enhanced UUID generation functions in utils package
- Updated update logic to handle new configuration structure
- Added routines for cleaning temporary runtime directories
- Introduced response formatting for API responses

cmd/root.go

@@ -0,0 +1,26 @@
+package cmd
+
+import (
+	"log"
+	"os"
+
+	"github.com/spf13/cobra"
+)
+
+var rootCmd = &cobra.Command{
+	Use:   "node",
+	Short: "Go Sally node",
+	Long:  "Main node runner for Go Sally",
+	Run: func(cmd *cobra.Command, args []string) {
+		cmd.Help()
+	},
+}
+
+func Execute() {
+	log.SetOutput(os.Stdout)
+	log.SetPrefix("\033[34m[INIT]\033[0m ")
+	log.SetFlags(log.Ldate | log.Ltime)
+	if err := rootCmd.Execute(); err != nil {
+		log.Fatalf("Unexpected error: %s", err.Error())
+	}
+}